tsk-61: Adding changes to make feature available

src/callers/register.rs

@@ -52,6 +52,7 @@ pub async fn register_user(
     axum::Extension(pool): axum::Extension<sqlx::PgPool>,
     Json(payload): Json<request::Request>,
 ) -> (StatusCode, Json<response::Response>) {
+    if is_registration_enabled() {
         let mut user = icarus_models::user::User {
             username: payload.username.clone(),
             password: payload.password.clone(),
@@ -115,4 +116,10 @@ pub async fn register_user(
                 }),
             ),
         }
+    } else {
+        (axum::http::StatusCode::NOT_ACCEPTABLE, Json(response::Response{
+            message: String::from("Registration is not enabled"),
+            data:: Vec::new()
+        }))
+    }
 }