diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 10ae4ad..05cc92d 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -18,7 +18,7 @@ pnpm install
 This project includes a `__playground.ts` file for testing any local changes. To get started, open the file and replace these lines with values pertinent to your user account on RetroAchievements:
 
 ```ts
-const userName = "myUserName";
+const username = "myUsername";
 const webApiKey = "myWebApiKey";
 ```
 
diff --git a/README.md b/README.md
index 4f0fc71..1447982 100644
--- a/README.md
+++ b/README.md
@@ -54,10 +54,10 @@ To use any endpoint function in the API, you must first be authorized by RetroAc
 ```ts
 import { buildAuthorization } from "@retroachievements/api";
 
-const userName = "<your username on RA>";
+const username = "<your username on RA>";
 const webApiKey = "<your web API key>";
 
-const authorization = buildAuthorization({ userName, webApiKey });
+const authorization = buildAuthorization({ username, webApiKey });
 ```
 
 4. You now have all you need to use any function in the API. Each function takes this authorization object as its first argument. Here's an example:
diff --git a/src/__playground.ts b/src/__playground.ts
index 3931397..d563e07 100644
--- a/src/__playground.ts
+++ b/src/__playground.ts
@@ -17,7 +17,7 @@
 import { buildAuthorization, getAchievementCount } from "./index";
 
 // MODIFY THESE VALUES.
-const userName = "myUserName";
+const username = "myUsername";
 const webApiKey = "myWebApiKey";
 
 const main = async () => {
@@ -25,13 +25,13 @@ const main = async () => {
 
   // -- Start testing stuff here --
 
-  if (userName === "myUserName" || webApiKey === "myWebApiKey") {
+  if (username === "myUsername" || webApiKey === "myWebApiKey") {
     console.error(
-      "⛔️  ERROR: In __playground.ts, modify the userName and webApiKey variables to match your RA credentials.\n"
+      "⛔️  ERROR: In __playground.ts, modify the username and webApiKey variables to match your RA credentials.\n"
     );
   }
 
-  const authorization = buildAuthorization({ userName, webApiKey });
+  const authorization = buildAuthorization({ username, webApiKey });
 
   const achievementCount = await getAchievementCount(authorization, {
     gameId: 14_402,
diff --git a/src/achievement/getAchievementUnlocks.test.ts b/src/achievement/getAchievementUnlocks.test.ts
index 0a7296e..cbfe1fb 100644
--- a/src/achievement/getAchievementUnlocks.test.ts
+++ b/src/achievement/getAchievementUnlocks.test.ts
@@ -22,7 +22,7 @@ describe("Function: getAchievementUnlocks", () => {
   it("retrieves metadata about unlocks for a target achievement", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
diff --git a/src/achievement/getAchievementUnlocks.ts b/src/achievement/getAchievementUnlocks.ts
index 978a8d9..6e76af2 100644
--- a/src/achievement/getAchievementUnlocks.ts
+++ b/src/achievement/getAchievementUnlocks.ts
@@ -15,7 +15,7 @@ import type {
  * A call to this function will retrieve a list of users who
  * have earned a given achievement, targeted by the achievement's ID.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @param payload.achievementId The target achievement we want to
diff --git a/src/console/getConsoleIds.test.ts b/src/console/getConsoleIds.test.ts
index 0b614bf..5906fe3 100644
--- a/src/console/getConsoleIds.test.ts
+++ b/src/console/getConsoleIds.test.ts
@@ -24,7 +24,7 @@ describe("Function: getConsoleIds", () => {
   it("retrieves a list of console IDs and their names and cleans properties", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
diff --git a/src/console/getConsoleIds.ts b/src/console/getConsoleIds.ts
index bb6f074..7ee91a6 100644
--- a/src/console/getConsoleIds.ts
+++ b/src/console/getConsoleIds.ts
@@ -12,7 +12,7 @@ import type { ConsoleId, GetConsoleIdsResponse } from "./models";
  * of console ID and name pairs on the RetroAchievements.org
  * platform.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @example
diff --git a/src/console/getGameList.test.ts b/src/console/getGameList.test.ts
index 7b13f94..06adeda 100644
--- a/src/console/getGameList.test.ts
+++ b/src/console/getGameList.test.ts
@@ -24,7 +24,7 @@ describe("Function: getGameList", () => {
   it("retrieves a list of games and cleans their properties", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
diff --git a/src/console/getGameList.ts b/src/console/getGameList.ts
index 6008682..c5c761a 100644
--- a/src/console/getGameList.ts
+++ b/src/console/getGameList.ts
@@ -12,7 +12,7 @@ import type { GameList, GetGameListResponse } from "./models";
  * of games for a specified console on the RetroAchievements.org
  * platform.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @param payload.consoleId The unique console ID to retrieve a list of
diff --git a/src/feed/getAchievementOfTheWeek.test.ts b/src/feed/getAchievementOfTheWeek.test.ts
index 9d2c16a..128ae70 100644
--- a/src/feed/getAchievementOfTheWeek.test.ts
+++ b/src/feed/getAchievementOfTheWeek.test.ts
@@ -27,7 +27,7 @@ describe("Function: getAchievementOfTheWeek", () => {
   it("retrieves metadata about the current achievement of the week and cleans properties", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -105,7 +105,7 @@ describe("Function: getAchievementOfTheWeek", () => {
   it("properly sets the hardcore boolean value when cleaning properties", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
diff --git a/src/feed/getAchievementOfTheWeek.ts b/src/feed/getAchievementOfTheWeek.ts
index fa877f7..bfedbee 100644
--- a/src/feed/getAchievementOfTheWeek.ts
+++ b/src/feed/getAchievementOfTheWeek.ts
@@ -14,7 +14,7 @@ import type {
  * A call to this function will retrieve comprehensive
  * metadata about the current Achievement of the Week.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @example
diff --git a/src/feed/getActiveClaims.test.ts b/src/feed/getActiveClaims.test.ts
index 500ed4a..25cc266 100644
--- a/src/feed/getActiveClaims.test.ts
+++ b/src/feed/getActiveClaims.test.ts
@@ -24,7 +24,7 @@ describe("Function: getActiveClaims", () => {
   it("retrieves metadata about current active claims", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
diff --git a/src/feed/getActiveClaims.ts b/src/feed/getActiveClaims.ts
index 2846438..ab9bac9 100644
--- a/src/feed/getActiveClaims.ts
+++ b/src/feed/getActiveClaims.ts
@@ -11,7 +11,7 @@ import type { GetSetClaimsResponse, SetClaim } from "./models";
  * A call to this function returns information about all
  * (1000 max) active set claims.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @example
diff --git a/src/feed/getClaims.test.ts b/src/feed/getClaims.test.ts
index 26506d9..2007068 100644
--- a/src/feed/getClaims.test.ts
+++ b/src/feed/getClaims.test.ts
@@ -24,7 +24,7 @@ describe("Function: getClaims", () => {
   it("retrieves metadata about a requested kind of claims", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
diff --git a/src/feed/getTopTenUsers.test.ts b/src/feed/getTopTenUsers.test.ts
index 5680b1e..0b9e0dc 100644
--- a/src/feed/getTopTenUsers.test.ts
+++ b/src/feed/getTopTenUsers.test.ts
@@ -22,7 +22,7 @@ describe("Function: getTopTenUsers", () => {
   it("retrieves metadata about the current top ten users on the site", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -51,48 +51,48 @@ describe("Function: getTopTenUsers", () => {
     // ASSERT
     expect(response).toEqual([
       {
-        userName: "MaxMilyin",
+        username: "MaxMilyin",
         totalPoints: 346_289,
         totalRatioPoints: 995_092,
       },
       {
-        userName: "HippopotamusRex",
+        username: "HippopotamusRex",
         totalPoints: 312_118,
         totalRatioPoints: 1_151_351,
       },
       {
-        userName: "Sarconius",
+        username: "Sarconius",
         totalPoints: 257_862,
         totalRatioPoints: 1_181_770,
       },
-      { userName: "guineu", totalPoints: 241_623, totalRatioPoints: 672_597 },
+      { username: "guineu", totalPoints: 241_623, totalRatioPoints: 672_597 },
       {
-        userName: "Andrey199650",
+        username: "Andrey199650",
         totalPoints: 240_101,
         totalRatioPoints: 567_522,
       },
       {
-        userName: "Wendigo",
+        username: "Wendigo",
         totalPoints: 227_903,
         totalRatioPoints: 1_099_685,
       },
       {
-        userName: "donutweegee",
+        username: "donutweegee",
         totalPoints: 204_701,
         totalRatioPoints: 587_221,
       },
       {
-        userName: "AmericanNinja",
+        username: "AmericanNinja",
         totalPoints: 202_980,
         totalRatioPoints: 567_618,
       },
       {
-        userName: "Infernum",
+        username: "Infernum",
         totalPoints: 202_171,
         totalRatioPoints: 689_967,
       },
       {
-        userName: "FabricioPrie",
+        username: "FabricioPrie",
         totalPoints: 196_974,
         totalRatioPoints: 450_436,
       },
diff --git a/src/feed/getTopTenUsers.ts b/src/feed/getTopTenUsers.ts
index cd2244c..d7bad0a 100644
--- a/src/feed/getTopTenUsers.ts
+++ b/src/feed/getTopTenUsers.ts
@@ -10,7 +10,7 @@ import type {
  * A call to this function will retrieve the current top ten users
  * on the site.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @example
@@ -21,8 +21,8 @@ import type {
  * @returns An array containing the list of top ten users.
  * ```json
  * [
- *   { userName: "MockUser", totalPoints: 350000, totalRatioPoints: 995000 },
- *   { userName: "MockUser2", totalPoints: 345000, totalRatioPoints: 994000 },
+ *   { username: "MockUser", totalPoints: 350000, totalRatioPoints: 995000 },
+ *   { username: "MockUser2", totalPoints: 345000, totalRatioPoints: 994000 },
  *   // ...
  * ]
  * ```
@@ -41,7 +41,7 @@ export const getTopTenUsers = async (
   const sanitizedTopTenUsers: TopTenUsersEntity[] = [];
   for (const rawUser of rawTopTenUsers) {
     sanitizedTopTenUsers.push({
-      userName: rawUser["1"],
+      username: rawUser["1"],
       totalPoints: Number(rawUser["2"]),
       totalRatioPoints: Number(rawUser["3"]),
     });
diff --git a/src/feed/models/top-ten-users-entity.model.ts b/src/feed/models/top-ten-users-entity.model.ts
index 9e522c5..bcd9f6e 100644
--- a/src/feed/models/top-ten-users-entity.model.ts
+++ b/src/feed/models/top-ten-users-entity.model.ts
@@ -1,5 +1,5 @@
 export interface TopTenUsersEntity {
-  userName: string;
+  username: string;
   totalPoints: number;
   totalRatioPoints: number;
 }
diff --git a/src/game/getAchievementCount.test.ts b/src/game/getAchievementCount.test.ts
index 2087cb0..0a4ed73 100644
--- a/src/game/getAchievementCount.test.ts
+++ b/src/game/getAchievementCount.test.ts
@@ -22,7 +22,7 @@ describe("Function: getAchievementCount", () => {
   it("given a game ID, retrieves the list of achievement IDs associated with the game and cleans properties", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
diff --git a/src/game/getAchievementCount.ts b/src/game/getAchievementCount.ts
index 72c691f..f952fb6 100644
--- a/src/game/getAchievementCount.ts
+++ b/src/game/getAchievementCount.ts
@@ -12,7 +12,7 @@ import type { AchievementCount, GetAchievementCountResponse } from "./models";
  * A call to this function will retrieve the list of
  * achievement IDs for a game, targeted by game ID.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @param payload.gameId The unique game ID. If you are unsure, open the
diff --git a/src/game/getAchievementDistribution.test.ts b/src/game/getAchievementDistribution.test.ts
index 7ff4853..acfbe0c 100644
--- a/src/game/getAchievementDistribution.test.ts
+++ b/src/game/getAchievementDistribution.test.ts
@@ -23,7 +23,7 @@ describe("Function: getAchievementDistribution", () => {
   it("given a game ID, retrieves the achievement distribution associated with the game", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -61,7 +61,7 @@ describe("Function: getAchievementDistribution", () => {
   it("given flags, successfully attaches the option to the call", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -101,7 +101,7 @@ describe("Function: getAchievementDistribution", () => {
   it("given a truthy hardcore value, successfully attaches the option to the call", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -138,7 +138,7 @@ describe("Function: getAchievementDistribution", () => {
   it("given a falsy hardcore value, successfully attaches the option to the call", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
diff --git a/src/game/getAchievementDistribution.ts b/src/game/getAchievementDistribution.ts
index 5a85997..88acc26 100644
--- a/src/game/getAchievementDistribution.ts
+++ b/src/game/getAchievementDistribution.ts
@@ -11,7 +11,7 @@ import type {
  * of the number of players who have earned a specific
  * number of achievements for a given game ID.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @param payload.gameId The unique game ID. If you are unsure, open the
diff --git a/src/game/getGame.test.ts b/src/game/getGame.test.ts
index a906fe5..f29e244 100644
--- a/src/game/getGame.test.ts
+++ b/src/game/getGame.test.ts
@@ -24,7 +24,7 @@ describe("Function: getGame", () => {
   it("given a game ID, retrieves basic metadata about the game", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
diff --git a/src/game/getGame.ts b/src/game/getGame.ts
index 17e127a..4f2e6f7 100644
--- a/src/game/getGame.ts
+++ b/src/game/getGame.ts
@@ -12,7 +12,7 @@ import type { Game, GetGameResponse } from "./models";
  * A call to this function will retrieve basic metadata about
  * a game, targeted via its unique ID.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @param payload.gameId The unique game ID. If you are unsure, open the
diff --git a/src/game/getGameExtended.test.ts b/src/game/getGameExtended.test.ts
index 23ec396..590b6ff 100644
--- a/src/game/getGameExtended.test.ts
+++ b/src/game/getGameExtended.test.ts
@@ -24,7 +24,7 @@ describe("Function: getGameExtended", () => {
   it("given a game ID, retrieves extended metadata about the game", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
diff --git a/src/game/getGameExtended.ts b/src/game/getGameExtended.ts
index 053981c..37da0b0 100644
--- a/src/game/getGameExtended.ts
+++ b/src/game/getGameExtended.ts
@@ -12,7 +12,7 @@ import type { GameExtended, GetGameExtendedResponse } from "./models";
  * A call to this function will retrieve extended metadata
  * about a game, targeted via its unique ID.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @param payload.gameId The unique game ID. If you are unsure, open the
diff --git a/src/game/getGameRankAndScore.test.ts b/src/game/getGameRankAndScore.test.ts
index 5c6d60b..5a24b67 100644
--- a/src/game/getGameRankAndScore.test.ts
+++ b/src/game/getGameRankAndScore.test.ts
@@ -24,7 +24,7 @@ describe("Function: getGameRankAndScore", () => {
   it("given a game ID, retrieves metadata about latest masteries for a game", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
diff --git a/src/game/getGameRankAndScore.ts b/src/game/getGameRankAndScore.ts
index 78726e5..7d8367d 100644
--- a/src/game/getGameRankAndScore.ts
+++ b/src/game/getGameRankAndScore.ts
@@ -17,7 +17,7 @@ import type {
  * points earners for a game. The game is targeted via
  * its unique ID.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @param payload.gameId The unique game ID. If you are unsure, open the
diff --git a/src/game/getGameRating.test.ts b/src/game/getGameRating.test.ts
index e1ed339..a569112 100644
--- a/src/game/getGameRating.test.ts
+++ b/src/game/getGameRating.test.ts
@@ -22,7 +22,7 @@ describe("Function: getGameRating", () => {
   it("given a game ID, retrieves metadata about how users have rated it", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
diff --git a/src/game/getGameRating.ts b/src/game/getGameRating.ts
index 99ff07f..a0dd400 100644
--- a/src/game/getGameRating.ts
+++ b/src/game/getGameRating.ts
@@ -12,7 +12,7 @@ import type { GameRating, GetGameRatingResponse } from "./models";
  * A call to this function will retrieve metadata about
  * how users have rated the game and its set.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @param payload.gameId The unique game ID. If you are unsure, open the
diff --git a/src/ticket/getTicketData.test.ts b/src/ticket/getTicketData.test.ts
index 8e4e751..7102bb4 100644
--- a/src/ticket/getTicketData.test.ts
+++ b/src/ticket/getTicketData.test.ts
@@ -28,7 +28,7 @@ describe("Function: getTicketData", () => {
   it("given only a ticket ID, retrieves ticket data", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -96,7 +96,7 @@ describe("Function: getTicketData", () => {
   it("given no IDs, retrieves a list of recent tickets", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -184,7 +184,7 @@ describe("Function: getTicketData", () => {
   it("can retrieve a list of the most ticketed games", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -244,7 +244,7 @@ describe("Function: getTicketData", () => {
   it("can retrieve metadata about a user's tickets", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -264,7 +264,7 @@ describe("Function: getTicketData", () => {
     );
 
     // ACT
-    const response = await getTicketData(authorization, { userName: "xelnia" });
+    const response = await getTicketData(authorization, { username: "xelnia" });
 
     // ASSERT
     expect(response).toEqual({
@@ -280,7 +280,7 @@ describe("Function: getTicketData", () => {
   it("can retrieve metadata about a game's tickets", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -314,7 +314,7 @@ describe("Function: getTicketData", () => {
   it("can retrieve metadata about an achievement's tickets", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
diff --git a/src/ticket/getTicketData.ts b/src/ticket/getTicketData.ts
index 4593546..98e5e39 100644
--- a/src/ticket/getTicketData.ts
+++ b/src/ticket/getTicketData.ts
@@ -20,7 +20,7 @@ interface GetTicketDataAllPayloadValues {
   offset?: number;
   count?: number;
   isGettingMostTicketedGames?: true;
-  userName?: string;
+  username?: string;
   gameId?: string | number;
   isGettingTicketsForUnofficialAchievements?: true;
   shouldReturnTicketsList?: true;
@@ -35,7 +35,7 @@ interface GetTicketDataAllPayloadValues {
  * A call to this function will retrieve ticket metadata information
  * about a single achievement ticket, targeted by its ticket ID.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @param payload.ticketId The ID of the ticket to get information about.
@@ -59,7 +59,7 @@ export function getTicketData(
  * A call to this function will retrieve ticket metadata information
  * about the latest opened achievement tickets on RetroAchievements.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @param payload.count Optional. Defaults to 10. Max is 100.
@@ -84,7 +84,7 @@ export function getTicketData(
  * A call to this function will retrieve the games on the site with
  * the highest count of opened achievement tickets.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @param payload.count Optional. Defaults to 10. Max is 100.
@@ -112,17 +112,17 @@ export function getTicketData(
  * A call to this function will retrieve an achievement developer's
  * ticket stats, targeted by that developer's username.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
- * @param payload.userName The developer's account username to retrieve
+ * @param payload.username The developer's account username to retrieve
  * ticket stats for.
  *
  * @example
  * ```
  * const ticketData = await getTicketData(
  *   authorization,
- *   { userName: "xelnia" }
+ *   { username: "xelnia" }
  * );
  * ```
  *
@@ -130,7 +130,7 @@ export function getTicketData(
  */
 export function getTicketData(
   authorization: AuthObject,
-  payload: { userName: string }
+  payload: { username: string }
 ): Promise<UserTicketStats>;
 
 /**
@@ -138,7 +138,7 @@ export function getTicketData(
  * by the game's ID. If you are unsure of a game's ID, visit its page
  * on the RetroAchievements website and copy the number at the end of the URL.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @param payload.gameId The game ID to fetch ticket stats for.
@@ -174,7 +174,7 @@ export function getTicketData(
  * of an achievement's ID, open its page on the RetroAchievements
  * website and copy the number at the end of the URL.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @param payload.achievementId The ID of the achievement to fetch ticket
@@ -234,7 +234,7 @@ const buildGetTicketDataQueryParams = (
   const {
     ticketId,
     isGettingMostTicketedGames,
-    userName,
+    username,
     gameId,
     isGettingTicketsForUnofficialAchievements,
     shouldReturnTicketsList,
@@ -248,8 +248,8 @@ const buildGetTicketDataQueryParams = (
   } else if (isGettingMostTicketedGames) {
     queryParams["f"] = "1";
     queryParams = applyPaginationQueryParams(queryParams, payload);
-  } else if (userName) {
-    queryParams["u"] = userName;
+  } else if (username) {
+    queryParams["u"] = username;
   } else if (gameId) {
     queryParams["g"] = gameId;
 
diff --git a/src/user/getAchievementsEarnedBetween.test.ts b/src/user/getAchievementsEarnedBetween.test.ts
index b4304db..7c47819 100644
--- a/src/user/getAchievementsEarnedBetween.test.ts
+++ b/src/user/getAchievementsEarnedBetween.test.ts
@@ -25,7 +25,7 @@ describe("Function: getAchievementsEarnedBetween", () => {
   it("retrieves a list of user achievements earned between a set of dates", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -58,7 +58,7 @@ describe("Function: getAchievementsEarnedBetween", () => {
 
     // ACT
     const response = await getAchievementsEarnedBetween(authorization, {
-      userName: "xelnia",
+      username: "xelnia",
       fromDate: new Date("2022-10-12"),
       toDate: new Date("2022-10-13"),
     });
diff --git a/src/user/getAchievementsEarnedBetween.ts b/src/user/getAchievementsEarnedBetween.ts
index 03368be..a496b22 100644
--- a/src/user/getAchievementsEarnedBetween.ts
+++ b/src/user/getAchievementsEarnedBetween.ts
@@ -14,10 +14,10 @@ import type {
  * A call to this function will retrieve a list of achievements
  * earned by a given user between two provided dates.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
- * @param payload.userName The user for which to retrieve the
+ * @param payload.username The user for which to retrieve the
  * list of achievements for.
  *
  * @param payload.fromDate A Date object specifying when
@@ -31,7 +31,7 @@ import type {
  * const achievementsEarnedBetween = await getAchievementsEarnedBetween(
  *   authorization,
  *   {
- *     userName: "xelnia",
+ *     username: "xelnia",
  *     fromDate: new Date("2022-10-12"),
  *     toDate: new Date("2022-10-13")
  *   }
@@ -65,16 +65,16 @@ import type {
  */
 export const getAchievementsEarnedBetween = async (
   authorization: AuthObject,
-  payload: { userName: string; fromDate: Date; toDate: Date }
+  payload: { username: string; fromDate: Date; toDate: Date }
 ): Promise<DatedUserAchievement[]> => {
-  const { userName, fromDate, toDate } = payload;
+  const { username, fromDate, toDate } = payload;
 
   const url = buildRequestUrl(
     apiBaseUrl,
     "/API_GetAchievementsEarnedBetween.php",
     authorization,
     {
-      u: userName,
+      u: username,
       f: (fromDate.getTime() / 1000).toFixed(0),
       t: (toDate.getTime() / 1000).toFixed(0),
     }
diff --git a/src/user/getAchievementsEarnedOnDay.test.ts b/src/user/getAchievementsEarnedOnDay.test.ts
index 6a3ccba..ea856f2 100644
--- a/src/user/getAchievementsEarnedOnDay.test.ts
+++ b/src/user/getAchievementsEarnedOnDay.test.ts
@@ -25,7 +25,7 @@ describe("Function: getAchievementsEarnedOnDay", () => {
   it("retrieves a list of user achievements earned on a specified date", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -58,7 +58,7 @@ describe("Function: getAchievementsEarnedOnDay", () => {
 
     // ACT
     const response = await getAchievementsEarnedOnDay(authorization, {
-      userName: "xelnia",
+      username: "xelnia",
       onDate: new Date("2022-10-12"),
     });
 
diff --git a/src/user/getAchievementsEarnedOnDay.ts b/src/user/getAchievementsEarnedOnDay.ts
index 890cbc7..8867b8d 100644
--- a/src/user/getAchievementsEarnedOnDay.ts
+++ b/src/user/getAchievementsEarnedOnDay.ts
@@ -14,10 +14,10 @@ import type {
  * A call to this function will retrieve a list of achievements
  * earned by a given user on a specified date.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
- * @param payload.userName The user for which to retrieve the
+ * @param payload.username The user for which to retrieve the
  * list of achievements for.
  *
  * @param payload.fromDate A Date object specifying when
@@ -31,7 +31,7 @@ import type {
  * const achievementsEarnedOnDay = await getAchievementsEarnedOnDay(
  *   authorization,
  *   {
- *     userName: "xelnia",
+ *     username: "xelnia",
  *     onDate: new Date("2022-10-13")
  *   }
  * );
@@ -64,16 +64,16 @@ import type {
  */
 export const getAchievementsEarnedOnDay = async (
   authorization: AuthObject,
-  payload: { userName: string; onDate: Date }
+  payload: { username: string; onDate: Date }
 ): Promise<DatedUserAchievement[]> => {
-  const { userName, onDate } = payload;
+  const { username, onDate } = payload;
 
   const url = buildRequestUrl(
     apiBaseUrl,
     "/API_GetAchievementsEarnedOnDay.php",
     authorization,
     {
-      u: userName,
+      u: username,
       // YYYY-MM-DD
       d: `${onDate.getFullYear()}-${onDate.getMonth() + 1}-${onDate.getDate()}`,
     }
diff --git a/src/user/getGameInfoAndUserProgress.test.ts b/src/user/getGameInfoAndUserProgress.test.ts
index 03ee518..4d0a73a 100644
--- a/src/user/getGameInfoAndUserProgress.test.ts
+++ b/src/user/getGameInfoAndUserProgress.test.ts
@@ -24,7 +24,7 @@ describe("Function: getGameInfoAndUserProgress", () => {
   it("given a game ID and a username, retrieves extended metadata about the game and that user`s progress", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -82,7 +82,7 @@ describe("Function: getGameInfoAndUserProgress", () => {
     // ACT
     const response = await getGameInfoAndUserProgress(authorization, {
       gameId: 14_402,
-      userName: "xelnia",
+      username: "xelnia",
     });
 
     // ASSERT
diff --git a/src/user/getGameInfoAndUserProgress.ts b/src/user/getGameInfoAndUserProgress.ts
index 57e1c88..d383a0b 100644
--- a/src/user/getGameInfoAndUserProgress.ts
+++ b/src/user/getGameInfoAndUserProgress.ts
@@ -16,7 +16,7 @@ import type {
  * about a game, in addition to a user's progress about a game.
  * This is targeted via a game's unique ID and a given username.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @param payload.gameId The unique game ID. If you are unsure, open the
@@ -24,14 +24,14 @@ import type {
  * URL is https://retroachievements.org/game/14402. We can see from the
  * URL that the game ID is "14402".
  *
- * @param payload.userName The user for which to retrieve the
+ * @param payload.username The user for which to retrieve the
  * game progress for.
  *
  * @example
  * ```
  * const gameInfoAndUserProgress = await getGameInfoAndUserProgress(
  *   authorization,
- *   { gameId: 14402, userName: "wv_pinball" }
+ *   { gameId: 14402, username: "wv_pinball" }
  * );
  * ```
  *
@@ -87,9 +87,9 @@ import type {
  */
 export const getGameInfoAndUserProgress = async (
   authorization: AuthObject,
-  payload: { gameId: ID; userName: string }
+  payload: { gameId: ID; username: string }
 ): Promise<GameInfoAndUserProgress> => {
-  const { gameId, userName } = payload;
+  const { gameId, username } = payload;
 
   const url = buildRequestUrl(
     apiBaseUrl,
@@ -97,7 +97,7 @@ export const getGameInfoAndUserProgress = async (
     authorization,
     {
       g: gameId,
-      u: userName,
+      u: username,
     }
   );
 
diff --git a/src/user/getUserAwards.test.ts b/src/user/getUserAwards.test.ts
index 94a7541..b420c8f 100644
--- a/src/user/getUserAwards.test.ts
+++ b/src/user/getUserAwards.test.ts
@@ -22,7 +22,7 @@ describe("Function: getUserAwards", () => {
   it("retrieves a list of a target user awards", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -57,7 +57,7 @@ describe("Function: getUserAwards", () => {
     );
 
     // ACT
-    const response = await getUserAwards(authorization, { userName: "xelnia" });
+    const response = await getUserAwards(authorization, { username: "xelnia" });
 
     // ASSERT
     expect(response).toEqual({
diff --git a/src/user/getUserAwards.ts b/src/user/getUserAwards.ts
index 6a3638d..b45f9eb 100644
--- a/src/user/getUserAwards.ts
+++ b/src/user/getUserAwards.ts
@@ -11,16 +11,16 @@ import type { GetUserAwardsResponse, UserAwards } from "./models";
  * A call to this function will retrieve metadata about the target user's
  * site awards, via their username.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
- * @param payload.userName The user for which to retrieve the site awards for.
+ * @param payload.username The user for which to retrieve the site awards for.
  *
  * @example
  * ```
  * const userAwards = await getUserAwards(
  *   authorization,
- *   { userName: "xelnia" }
+ *   { username: "xelnia" }
  * )
  * ```
  *
@@ -53,11 +53,11 @@ import type { GetUserAwardsResponse, UserAwards } from "./models";
  */
 export const getUserAwards = async (
   authorization: AuthObject,
-  payload: { userName: string }
+  payload: { username: string }
 ): Promise<UserAwards> => {
-  const { userName } = payload;
+  const { username } = payload;
 
-  const queryParams: Record<string, string> = { u: userName };
+  const queryParams: Record<string, string> = { u: username };
 
   const url = buildRequestUrl(
     apiBaseUrl,
diff --git a/src/user/getUserClaims.test.ts b/src/user/getUserClaims.test.ts
index bb9b850..6a1ef0b 100644
--- a/src/user/getUserClaims.test.ts
+++ b/src/user/getUserClaims.test.ts
@@ -23,7 +23,7 @@ describe("Function: getUserClaims", () => {
 
   it("given a username, retrieves a list of achievement set claims for the user", async () => {
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -55,7 +55,7 @@ describe("Function: getUserClaims", () => {
 
     // ACT
     const response = await getUserClaims(authorization, {
-      userName: "Jamiras",
+      username: "Jamiras",
     });
 
     // ASSERT
diff --git a/src/user/getUserClaims.ts b/src/user/getUserClaims.ts
index d47d5f1..c4c4f71 100644
--- a/src/user/getUserClaims.ts
+++ b/src/user/getUserClaims.ts
@@ -12,17 +12,17 @@ import type { GetUserClaimsResponse, UserClaims } from "./models";
  * achievement set claims made over the lifetime of a given
  * user, targeted by their username.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
- * @param payload.userName The user for which to retrieve the historical
+ * @param payload.username The user for which to retrieve the historical
  * achievement set claims list for.
  *
  * @example
  * ```
  * const userClaims = await getUserClaims(
  *   authorization,
- *   { userName: "Jamiras" }
+ *   { username: "Jamiras" }
  * );
  * ```
  *
@@ -31,15 +31,15 @@ import type { GetUserClaimsResponse, UserClaims } from "./models";
  */
 export const getUserClaims = async (
   authorization: AuthObject,
-  payload: { userName: string }
+  payload: { username: string }
 ): Promise<UserClaims> => {
-  const { userName } = payload;
+  const { username } = payload;
 
   const url = buildRequestUrl(
     apiBaseUrl,
     "/API_GetUserClaims.php",
     authorization,
-    { u: userName }
+    { u: username }
   );
 
   const rawResponse = await call<GetUserClaimsResponse>({ url });
diff --git a/src/user/getUserCompletedGames.test.ts b/src/user/getUserCompletedGames.test.ts
index d062c2c..9bd781a 100644
--- a/src/user/getUserCompletedGames.test.ts
+++ b/src/user/getUserCompletedGames.test.ts
@@ -24,7 +24,7 @@ describe("Function: getUserCompletedGames", () => {
   it("given a username, returns completion metadata", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -61,7 +61,7 @@ describe("Function: getUserCompletedGames", () => {
 
     // ACT
     const response = await getUserCompletedGames(authorization, {
-      userName: "xelnia",
+      username: "xelnia",
     });
 
     // ASSERT
diff --git a/src/user/getUserCompletedGames.ts b/src/user/getUserCompletedGames.ts
index c675a0e..e37679e 100644
--- a/src/user/getUserCompletedGames.ts
+++ b/src/user/getUserCompletedGames.ts
@@ -17,17 +17,17 @@ import type {
  * one for the hardcore completion. These are designated by
  * the `hardcoreMode` property on each completion object.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
- * @param payload.userName The user for which to retrieve the
+ * @param payload.username The user for which to retrieve the
  * completion metadata for.
  *
  * @example
  * ```
  * const userCompletedGames = await getUserCompletedGames(
  *   authorization,
- *   { userName: "xelnia" }
+ *   { username: "xelnia" }
  * );
  * ```
  *
@@ -63,15 +63,15 @@ import type {
  */
 export const getUserCompletedGames = async (
   authorization: AuthObject,
-  payload: { userName: string }
+  payload: { username: string }
 ): Promise<UserCompletedGames> => {
-  const { userName } = payload;
+  const { username } = payload;
 
   const url = buildRequestUrl(
     apiBaseUrl,
     "/API_GetUserCompletedGames.php",
     authorization,
-    { u: userName }
+    { u: username }
   );
 
   const rawResponse = await call<GetUserCompletedGamesResponse>({ url });
diff --git a/src/user/getUserCompletionProgress.test.ts b/src/user/getUserCompletionProgress.test.ts
index 16efff0..b50b985 100644
--- a/src/user/getUserCompletionProgress.test.ts
+++ b/src/user/getUserCompletionProgress.test.ts
@@ -22,7 +22,7 @@ describe("Function: getUserCompletionProgress", () => {
   it("retrieves completion progress by username", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -54,7 +54,7 @@ describe("Function: getUserCompletionProgress", () => {
 
     // ACT
     const response = await getUserCompletionProgress(authorization, {
-      userName: "xelnia",
+      username: "xelnia",
     });
 
     // ASSERT
diff --git a/src/user/getUserCompletionProgress.ts b/src/user/getUserCompletionProgress.ts
index 3802051..a888035 100644
--- a/src/user/getUserCompletionProgress.ts
+++ b/src/user/getUserCompletionProgress.ts
@@ -14,10 +14,10 @@ import type {
  * A call to this function will retrieve a given user's completion
  * progress, targeted by their username.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
- * @param payload.userName The user for which to retrieve the progress for.
+ * @param payload.username The user for which to retrieve the progress for.
  *
  * @param payload.offset Defaults to 0. The number of entries to skip.
  *
@@ -27,7 +27,7 @@ import type {
  * ```
  * const userCompletionProgress = await getUserCompletionProgress(
  *   authorization,
- *   { userName: "xelnia" }
+ *   { username: "xelnia" }
  * );
  * ```
  *
@@ -56,12 +56,12 @@ import type {
  */
 export const getUserCompletionProgress = async (
   authorization: AuthObject,
-  payload: { userName: string; offset?: number; count?: number }
+  payload: { username: string; offset?: number; count?: number }
 ): Promise<UserCompletionProgress> => {
-  const { userName, offset, count } = payload;
+  const { username, offset, count } = payload;
 
   const params: Record<string, string | number> = {
-    u: userName,
+    u: username,
   };
   if (offset) {
     params["o"] = offset;
diff --git a/src/user/getUserGameRankAndScore.test.ts b/src/user/getUserGameRankAndScore.test.ts
index bfe4c48..349d09d 100644
--- a/src/user/getUserGameRankAndScore.test.ts
+++ b/src/user/getUserGameRankAndScore.test.ts
@@ -22,7 +22,7 @@ describe("Function: getUserGameRankAndScore", () => {
   it("given a game ID and a user name, retrieves metadata about how that user ranks on the given game", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -43,7 +43,7 @@ describe("Function: getUserGameRankAndScore", () => {
 
     // ACT
     const response = await getUserGameRankAndScore(authorization, {
-      userName: "xelnia",
+      username: "xelnia",
       gameId: 14_402,
     });
 
diff --git a/src/user/getUserGameRankAndScore.ts b/src/user/getUserGameRankAndScore.ts
index 1fab4f4..77aabd6 100644
--- a/src/user/getUserGameRankAndScore.ts
+++ b/src/user/getUserGameRankAndScore.ts
@@ -16,7 +16,7 @@ import type {
  * how a particular user has performed/ranked on a particular
  * game, targeted by game ID.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
  * @param payload.gameId The unique game ID. If you are unsure, open the
@@ -24,14 +24,14 @@ import type {
  * URL is https://retroachievements.org/game/14402. We can see from the
  * URL that the game ID is "14402".
  *
- * @param payload.userName The user for which to retrieve the
+ * @param payload.username The user for which to retrieve the
  * game ranking metadata for.
  *
  * @example
  * ```
  * const userGameRankAndScore = await getUserGameRankAndScore(
  *   authorization,
- *   { gameId: 14402, userName: "xelnia" }
+ *   { gameId: 14402, username: "xelnia" }
  * );
  * ```
  *
@@ -51,15 +51,15 @@ import type {
  */
 export const getUserGameRankAndScore = async (
   authorization: AuthObject,
-  payload: { gameId: ID; userName: string }
+  payload: { gameId: ID; username: string }
 ): Promise<UserGameRankAndScore> => {
-  const { gameId, userName } = payload;
+  const { gameId, username } = payload;
 
   const url = buildRequestUrl(
     apiBaseUrl,
     "/API_GetUserGameRankAndScore.php",
     authorization,
-    { g: gameId, u: userName }
+    { g: gameId, u: username }
   );
 
   const rawResponse = await call<GetUserGameRankAndScoreResponse>({ url });
diff --git a/src/user/getUserPoints.test.ts b/src/user/getUserPoints.test.ts
index 3718434..48f95b3 100644
--- a/src/user/getUserPoints.test.ts
+++ b/src/user/getUserPoints.test.ts
@@ -22,7 +22,7 @@ describe("Function: getUserPoints", () => {
   it("given a username, retrieves the point values associated with the user", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -38,7 +38,7 @@ describe("Function: getUserPoints", () => {
     );
 
     // ACT
-    const response = await getUserPoints(authorization, { userName: "xelnia" });
+    const response = await getUserPoints(authorization, { username: "xelnia" });
 
     // ASSERT
     expect(response).toEqual({
diff --git a/src/user/getUserPoints.ts b/src/user/getUserPoints.ts
index d9f7725..2b75e37 100644
--- a/src/user/getUserPoints.ts
+++ b/src/user/getUserPoints.ts
@@ -11,16 +11,16 @@ import type { GetUserPointsResponse, UserPoints } from "./models";
  * A call to this function will retrieve a given user's hardcore
  * and softcore points.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
- * @param payload.userName The user for which to retrieve the point totals for.
+ * @param payload.username The user for which to retrieve the point totals for.
  *
  * @example
  * ```
  * const userPoints = await getUserPoints(
  *   authorization,
- *   { userName: "xelnia" }
+ *   { username: "xelnia" }
  * );
  * ```
  *
@@ -34,15 +34,15 @@ import type { GetUserPointsResponse, UserPoints } from "./models";
  */
 export const getUserPoints = async (
   authorization: AuthObject,
-  payload: { userName: string }
+  payload: { username: string }
 ): Promise<UserPoints> => {
-  const { userName } = payload;
+  const { username } = payload;
 
   const url = buildRequestUrl(
     apiBaseUrl,
     "/API_GetUserPoints.php",
     authorization,
-    { u: userName }
+    { u: username }
   );
 
   const rawResponse = await call<GetUserPointsResponse>({ url });
diff --git a/src/user/getUserProfile.test.ts b/src/user/getUserProfile.test.ts
index d52cc4a..e908223 100644
--- a/src/user/getUserProfile.test.ts
+++ b/src/user/getUserProfile.test.ts
@@ -22,7 +22,7 @@ describe("Function: getUserProfile", () => {
   it("given a username, retrieves minimal user profile information about the user", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -53,7 +53,7 @@ describe("Function: getUserProfile", () => {
 
     // ACT
     const response = await getUserProfile(authorization, {
-      userName: "WCopeland",
+      username: "WCopeland",
     });
 
     // ASSERT
diff --git a/src/user/getUserProfile.ts b/src/user/getUserProfile.ts
index a6879c2..2e6b4eb 100644
--- a/src/user/getUserProfile.ts
+++ b/src/user/getUserProfile.ts
@@ -11,16 +11,16 @@ import type { GetUserProfileResponse, UserProfile } from "./models";
  * A call to this function will retrieve summary information about
  * a given user, targeted by username.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
- * @param payload.userName The user for which to retrieve the summary for.
+ * @param payload.username The user for which to retrieve the summary for.
  *
  * @example
  * ```
  * const userSummary = await getUserProfile(
  *   authorization,
- *   { userName: "xelnia" }
+ *   { username: "xelnia" }
  * );
  * ```
  *
@@ -29,16 +29,16 @@ import type { GetUserProfileResponse, UserProfile } from "./models";
 export const getUserProfile = async (
   authorization: AuthObject,
   payload: {
-    userName: string;
+    username: string;
   }
 ): Promise<UserProfile> => {
-  const { userName } = payload;
+  const { username } = payload;
 
   const url = buildRequestUrl(
     apiBaseUrl,
     "/API_GetUserProfile.php",
     authorization,
-    { u: userName }
+    { u: username }
   );
 
   const rawResponse = await call<GetUserProfileResponse>({ url });
diff --git a/src/user/getUserProgress.test.ts b/src/user/getUserProgress.test.ts
index 298a7e1..6551cfd 100644
--- a/src/user/getUserProgress.test.ts
+++ b/src/user/getUserProgress.test.ts
@@ -22,7 +22,7 @@ describe("Function: getUserProgress", () => {
   it(`retrieves a map of a user's progress by game IDs`, async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -53,7 +53,7 @@ describe("Function: getUserProgress", () => {
 
     // ACT
     const response = await getUserProgress(authorization, {
-      userName: "xelnia",
+      username: "xelnia",
       gameIds: [1, 14_402],
     });
 
diff --git a/src/user/getUserProgress.ts b/src/user/getUserProgress.ts
index 30a7b09..a06cae1 100644
--- a/src/user/getUserProgress.ts
+++ b/src/user/getUserProgress.ts
@@ -12,10 +12,10 @@ import type { GetUserProgressResponse, UserProgress } from "./models";
  * A call to this function will retrieve a given user's
  * progress on a given list of games, targeted by game ID.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
- * @param payload.userName The user for which to retrieve the progress for.
+ * @param payload.username The user for which to retrieve the progress for.
  *
  * @param payload.gameIds An array of RetroAchievements game IDs. If you aren't
  * sure of the game ID, visit the game's page on the website and copy the number
@@ -25,7 +25,7 @@ import type { GetUserProgressResponse, UserProgress } from "./models";
  * ```
  * const userProgress = await getUserProgress(
  *   authorization,
- *   { userName: "xelnia", gameIds: [1, 14402] }
+ *   { username: "xelnia", gameIds: [1, 14402] }
  * );
  * ```
  *
@@ -53,15 +53,15 @@ import type { GetUserProgressResponse, UserProgress } from "./models";
  */
 export const getUserProgress = async (
   authorization: AuthObject,
-  payload: { userName: string; gameIds: ID[] }
+  payload: { username: string; gameIds: ID[] }
 ): Promise<UserProgress> => {
-  const { userName, gameIds } = payload;
+  const { username, gameIds } = payload;
 
   const url = buildRequestUrl(
     apiBaseUrl,
     "/API_GetUserProgress.php",
     authorization,
-    { u: userName, i: gameIds.join(",") }
+    { u: username, i: gameIds.join(",") }
   );
 
   const rawResponse = await call<GetUserProgressResponse>({ url });
diff --git a/src/user/getUserRecentAchievements.test.ts b/src/user/getUserRecentAchievements.test.ts
index 3352e94..3f9af47 100644
--- a/src/user/getUserRecentAchievements.test.ts
+++ b/src/user/getUserRecentAchievements.test.ts
@@ -22,7 +22,7 @@ describe("Function: getUserRecentAchievements", () => {
   it("retrieves a list of recently-earned user achievements", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -54,7 +54,7 @@ describe("Function: getUserRecentAchievements", () => {
 
     // ACT
     const response = await getUserRecentAchievements(authorization, {
-      userName: "xelnia",
+      username: "xelnia",
     });
 
     // ASSERT
diff --git a/src/user/getUserRecentAchievements.ts b/src/user/getUserRecentAchievements.ts
index 4738a42..eec65b4 100644
--- a/src/user/getUserRecentAchievements.ts
+++ b/src/user/getUserRecentAchievements.ts
@@ -15,10 +15,10 @@ import type {
  * recently earned achievements, via their username. By default, it
  * fetches achievements earned in the last hour.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
- * @param payload.userName The user for which to retrieve the recent achievements for.
+ * @param payload.username The user for which to retrieve the recent achievements for.
  *
  * @param payload.recentMinutes Optional. Defaults to 60. How many minutes
  * back to fetch for the given user.
@@ -27,7 +27,7 @@ import type {
  * ```
  * const userRecentAchievements = await getUserRecentAchievements(
  *   authorization,
- *   { userName: "xelnia" }
+ *   { username: "xelnia" }
  * );
  * ```
  *
@@ -55,11 +55,11 @@ import type {
  */
 export const getUserRecentAchievements = async (
   authorization: AuthObject,
-  payload: { userName: string; recentMinutes?: number }
+  payload: { username: string; recentMinutes?: number }
 ): Promise<UserRecentAchievement[]> => {
-  const { userName, recentMinutes } = payload;
+  const { username, recentMinutes } = payload;
 
-  const queryParams: Record<string, string | number> = { u: userName };
+  const queryParams: Record<string, string | number> = { u: username };
 
   if (recentMinutes !== undefined) {
     queryParams["m"] = recentMinutes;
diff --git a/src/user/getUserRecentlyPlayedGames.test.ts b/src/user/getUserRecentlyPlayedGames.test.ts
index 6cd9d2c..7922838 100644
--- a/src/user/getUserRecentlyPlayedGames.test.ts
+++ b/src/user/getUserRecentlyPlayedGames.test.ts
@@ -22,7 +22,7 @@ describe("Function: getUserRecentlyPlayedGames", () => {
   it(`retrieves a list of a given user's recently played games`, async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -52,7 +52,7 @@ describe("Function: getUserRecentlyPlayedGames", () => {
 
     // ACT
     const response = await getUserRecentlyPlayedGames(authorization, {
-      userName: "xelnia",
+      username: "xelnia",
     });
 
     // ASSERT
diff --git a/src/user/getUserRecentlyPlayedGames.ts b/src/user/getUserRecentlyPlayedGames.ts
index 9784ee0..47dbe62 100644
--- a/src/user/getUserRecentlyPlayedGames.ts
+++ b/src/user/getUserRecentlyPlayedGames.ts
@@ -14,10 +14,10 @@ import type {
  * A call to this function will retrieve a list of a target user's
  * recently played games, via their username.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
- * @param payload.userName The user for which to retrieve the summary for.
+ * @param payload.username The user for which to retrieve the summary for.
  *
  * @param payload.count Optional. Defaults to 10. Max is 50. How many
  * recently played games for the user to retrieve.
@@ -29,7 +29,7 @@ import type {
  * ```
  * const userRecentlyPlayedGames = await getUserRecentlyPlayedGames(
  *   authorization,
- *   { userName: "xelnia" }
+ *   { username: "xelnia" }
  * );
  * ```
  *
@@ -55,11 +55,11 @@ import type {
  */
 export const getUserRecentlyPlayedGames = async (
   authorization: AuthObject,
-  payload: { userName: string; offset?: number; count?: number }
+  payload: { username: string; offset?: number; count?: number }
 ): Promise<UserRecentlyPlayedGames> => {
-  const { userName, offset, count } = payload;
+  const { username, offset, count } = payload;
 
-  const queryParams: Record<string, string | number> = { u: userName };
+  const queryParams: Record<string, string | number> = { u: username };
 
   if (offset !== undefined) {
     queryParams["o"] = offset;
diff --git a/src/user/getUserSummary.test.ts b/src/user/getUserSummary.test.ts
index fc7bb2f..0d7a754 100644
--- a/src/user/getUserSummary.test.ts
+++ b/src/user/getUserSummary.test.ts
@@ -24,7 +24,7 @@ describe("Function: getUserSummary", () => {
   it("given a username, retrieves user summary information about the user", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -38,7 +38,7 @@ describe("Function: getUserSummary", () => {
 
     // ACT
     const response = await getUserSummary(authorization, {
-      userName: "WCopeland",
+      username: "WCopeland",
     });
 
     // ASSERT
@@ -48,7 +48,7 @@ describe("Function: getUserSummary", () => {
   it("given the API returns a 503, throws an error", async () => {
     // ARRANGE
     const authorization = buildAuthorization({
-      userName: "mockUserName",
+      username: "mockUserName",
       webApiKey: "mockWebApiKey",
     });
 
@@ -62,7 +62,7 @@ describe("Function: getUserSummary", () => {
 
     // ASSERT
     await expect(
-      getUserSummary(authorization, { userName: "WCopeland" })
+      getUserSummary(authorization, { username: "WCopeland" })
     ).rejects.toThrow();
   });
 });
diff --git a/src/user/getUserSummary.ts b/src/user/getUserSummary.ts
index d5916de..e1176a1 100644
--- a/src/user/getUserSummary.ts
+++ b/src/user/getUserSummary.ts
@@ -11,10 +11,10 @@ import type { GetUserSummaryResponse, UserSummary } from "./models";
  * A call to this function will retrieve summary information about
  * a given user, targeted by username.
  *
- * @param authorization An object containing your userName and webApiKey.
+ * @param authorization An object containing your username and webApiKey.
  * This can be constructed with `buildAuthorization()`.
  *
- * @param payload.userName The user for which to retrieve the summary for.
+ * @param payload.username The user for which to retrieve the summary for.
  *
  * @param payload.recentGamesCount Optional. The number of recent games to return.
  * This defaults to 0.
@@ -26,7 +26,7 @@ import type { GetUserSummaryResponse, UserSummary } from "./models";
  * ```
  * const userSummary = await getUserSummary(
  *   authorization,
- *   { userName: "xelnia" }
+ *   { username: "xelnia" }
  * );
  * ```
  *
@@ -35,14 +35,14 @@ import type { GetUserSummaryResponse, UserSummary } from "./models";
 export const getUserSummary = async (
   authorization: AuthObject,
   payload: {
-    userName: string;
+    username: string;
     recentGamesCount?: number;
     recentAchievementsCount?: number;
   }
 ): Promise<UserSummary> => {
-  const { userName, recentGamesCount, recentAchievementsCount } = payload;
+  const { username, recentGamesCount, recentAchievementsCount } = payload;
 
-  const queryParams: Record<string, string | number> = { u: userName };
+  const queryParams: Record<string, string | number> = { u: username };
 
   if (recentGamesCount !== undefined) {
     queryParams["g"] = recentGamesCount;
diff --git a/src/utils/internal/buildRequestUrl.test.ts b/src/utils/internal/buildRequestUrl.test.ts
index e6e7511..decb453 100644
--- a/src/utils/internal/buildRequestUrl.test.ts
+++ b/src/utils/internal/buildRequestUrl.test.ts
@@ -22,7 +22,7 @@ describe("Util: buildRequestUrl", () => {
     const requestUrl = buildRequestUrl(
       baseUrl,
       endpointUrl,
-      { userName: "TestUser", webApiKey: "mockWebApiKey" },
+      { username: "TestUser", webApiKey: "mockWebApiKey" },
       args as any
     );
 
@@ -39,7 +39,7 @@ describe("Util: buildRequestUrl", () => {
 
     // ACT
     const requestUrl = buildRequestUrl(baseUrl, endpointUrl, {
-      userName: "TestUser",
+      username: "TestUser",
       webApiKey: "mockWebApiKey",
     });
 
diff --git a/src/utils/internal/buildRequestUrl.ts b/src/utils/internal/buildRequestUrl.ts
index a8eed9e..0ab00ec 100644
--- a/src/utils/internal/buildRequestUrl.ts
+++ b/src/utils/internal/buildRequestUrl.ts
@@ -14,7 +14,7 @@ export const buildRequestUrl = (
   // `z` and `y` are expected query params from the RA API.
   // Authentication is handled purely by query params.
   const queryParamValues: Record<string, string> = {
-    z: authObject.userName,
+    z: authObject.username,
     y: authObject.webApiKey,
   };
 
diff --git a/src/utils/public/buildAuthorization.test.ts b/src/utils/public/buildAuthorization.test.ts
index b3638fa..bb6b0a1 100644
--- a/src/utils/public/buildAuthorization.test.ts
+++ b/src/utils/public/buildAuthorization.test.ts
@@ -9,7 +9,7 @@ describe("Util: buildAuthorization", () => {
   it("returns the same object it is given", () => {
     // ARRANGE
     const myAuth = {
-      userName: "myUserName",
+      username: "myUserName",
       webApiKey: "myWebApiKey",
     };
 
@@ -20,7 +20,7 @@ describe("Util: buildAuthorization", () => {
     expect(authorization).toEqual(myAuth);
   });
 
-  it("throws an error if missing a userName", () => {
+  it("throws an error if missing a username", () => {
     // ASSERT
     // eslint-disable-next-line @typescript-eslint/ban-ts-comment
     // @ts-ignore - We're assuming the user is not using a TypeScript project.
@@ -31,6 +31,6 @@ describe("Util: buildAuthorization", () => {
     // ASSERT
     // eslint-disable-next-line @typescript-eslint/ban-ts-comment
     // @ts-ignore - We're assuming the user is not using a TypeScript project.
-    expect(() => buildAuthorization({ userName: "mockUserName" })).toThrow();
+    expect(() => buildAuthorization({ username: "mockUserName" })).toThrow();
   });
 });
diff --git a/src/utils/public/buildAuthorization.ts b/src/utils/public/buildAuthorization.ts
index 08fccf3..d95c007 100644
--- a/src/utils/public/buildAuthorization.ts
+++ b/src/utils/public/buildAuthorization.ts
@@ -15,19 +15,19 @@ import type { AuthObject } from "./models";
  * @example
  * ```
  * const authorization = buildAuthorization({
- *   userName: "Scott",
+ *   username: "Scott",
  *   webApiKey: "LtjCwW16nJI7cqOyPIQtXk8v1cfF0tmO"
  * });
  * ```
  */
 export const buildAuthorization = (options: AuthObject): AuthObject => {
-  if (!options.userName || !options.webApiKey) {
+  if (!options.username || !options.webApiKey) {
     throw new Error(`
       buildAuthorization() requires an object containing a
-      userName and webApiKey. eg:
+      username and webApiKey. eg:
 
       const authorization = buildAuthorization({
-        userName: "myUserName",
+        username: "myUserName",
         webApiKey: "myWebApiKey"
       })
     `);
diff --git a/src/utils/public/models/auth-object.model.ts b/src/utils/public/models/auth-object.model.ts
index ba2e859..c79f23a 100644
--- a/src/utils/public/models/auth-object.model.ts
+++ b/src/utils/public/models/auth-object.model.ts
@@ -1,6 +1,6 @@
 /**
  * Each RetroAchievements API call is uniquely authenticated
- * using a userName + API key combination. Your account's personal
+ * using a username + API key combination. Your account's personal
  * Web API Key can be found on the Settings page.
  */
 export interface AuthObject {
@@ -9,7 +9,7 @@ export interface AuthObject {
    * For example, https://retroachievements.org/user/Scott would have a value
    * of "Scott".
    */
-  userName: string;
+  username: string;
 
   /**
    * This can be found in the "Keys" section of your Settings page on the