diff --git a/CHANGELOG.md b/CHANGELOG.md
index a5c6779..0a4eb93 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # ChangeLog
 
+## 3rd June 2024
+
+### ft-sdk: `0.1.6`
+
+- added `#[serde(default)]` to `ft_sdk::auth::ProviderData`
+- added `#[derive(Default)` to `ft_sdk::auth::ProviderData`
+- added `#[derive(Debug)` to `ft_sdk::auth::{UserId, SessionID, Counter}`
+
 ## 31st May 2024
 
 ### ft-sdk: `0.1.5`
diff --git a/Cargo.lock b/Cargo.lock
index 3876e60..620c5ac 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -180,7 +180,7 @@ dependencies = [
 
 [[package]]
 name = "ft-sdk"
-version = "0.1.5"
+version = "0.1.6"
 dependencies = [
  "anyhow",
  "bytes",
diff --git a/ft-sdk/Cargo.toml b/ft-sdk/Cargo.toml
index eb5e3bc..b821b4d 100644
--- a/ft-sdk/Cargo.toml
+++ b/ft-sdk/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ft-sdk"
-version = "0.1.5"
+version = "0.1.6"
 description = "ft-sdk: SDK for building FifthTry Applications"
 authors.workspace = true
 edition.workspace = true
diff --git a/ft-sdk/src/auth/mod.rs b/ft-sdk/src/auth/mod.rs
index 0b2b74b..78f4527 100644
--- a/ft-sdk/src/auth/mod.rs
+++ b/ft-sdk/src/auth/mod.rs
@@ -11,10 +11,11 @@ pub use schema::{fastn_session, fastn_user};
 pub use session::SessionID;
 pub use utils::Counter;
 
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub struct UserId(pub i64);
 
-#[derive(serde::Serialize, serde::Deserialize, Clone, Debug)]
+#[derive(serde::Serialize, serde::Deserialize, Clone, Debug, Default)]
+#[serde(default)]
 pub struct ProviderData {
     pub identity: String,
     pub username: Option<String>,
diff --git a/ft-sdk/src/auth/session.rs b/ft-sdk/src/auth/session.rs
index 04e61c3..120f2f8 100644
--- a/ft-sdk/src/auth/session.rs
+++ b/ft-sdk/src/auth/session.rs
@@ -1,4 +1,4 @@
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub struct SessionID(pub String);
 
 #[cfg(feature = "auth-provider")]
diff --git a/ft-sdk/src/auth/utils.rs b/ft-sdk/src/auth/utils.rs
index c6b8e5a..82238f5 100644
--- a/ft-sdk/src/auth/utils.rs
+++ b/ft-sdk/src/auth/utils.rs
@@ -29,7 +29,7 @@ pub(crate) fn user_data_by_query(
     Ok((ft_sdk::auth::UserId(ud.id), serde_json::from_str(&ud.data)?))
 }
 
-#[derive(diesel::QueryableByName)]
+#[derive(diesel::QueryableByName, Debug)]
 pub struct Counter {
     #[diesel(sql_type = diesel::sql_types::BigInt)]
     pub count: i64,