Cleanup of lazy loading code. Made some DTOs use init rather than set to keep it clean.

API/DTOs/LoginDto.cs

@@ -2,7 +2,7 @@
 {
     public class LoginDto
     {
-        public string Username { get; set; }
-        public string Password { get; set; }
+        public string Username { get; init; }
+        public string Password { get; init; }
     }
 }