Reject malformed subscriber data

Cargo.toml

@@ -28,7 +28,12 @@ tracing = "0.1.40"
 tracing-bunyan-formatter = "0.3.9"
 tracing-log = "0.2.0"
 tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
+unicode-segmentation = "1.11.0"
 uuid = { version = "1.7.0", features = ["v4"] }
+validator = "0.16.1"
 
 [dev-dependencies]
+claims = "0.7.1"
+fake = "2.9.2"
+proptest = "1.4.0"
 reqwest = "0.11.24"

src/domain/mod.rs

@@ -0,0 +1,7 @@
+mod new_subscriber;
+mod subscriber_email;
+mod subscriber_name;
+
+pub use new_subscriber::NewSubscriber;
+pub use subscriber_email::SubscriberEmail;
+pub use subscriber_name::SubscriberName;

src/domain/new_subscriber.rs

@@ -0,0 +1,8 @@
+use super::{SubscriberEmail, SubscriberName};
+use serde::Deserialize;
+
+#[derive(Deserialize)]
+pub struct NewSubscriber {
+    pub email: SubscriberEmail,
+    pub name: SubscriberName,
+}