Lots of additions and changes

TOOHUCardAPI/DTO/AbstractResponse.cs

@@ -11,4 +11,17 @@ namespace TOOHUCardAPI.DTO
         [JsonProperty("msg")]
         public string Message { get; set; } = string.Empty;
     }
+
+    public class InvalidUserResponse : AbstractResponse
+    {
+        public InvalidUserResponse()
+        {
+            Code = "0001";
+            Message = "Invalid user";
+        }
+    }
+
+    public class OkResponse : AbstractResponse
+    {
+    }
 }