Implemented the interface in all responses

refr #132

src/models/responses/ResponseAuth.ts

@@ -1,9 +1,18 @@
 import { IsInt, IsString } from 'class-validator';
+import { ResponseObjectType } from '../enums/ResponseObjectType';
+import { IResponse } from './IResponse';
 
 /**
  * Defines the repsonse auth.
 */
-export class ResponseAuth {
+export class ResponseAuth implements IResponse {
+
+  /**
+    * The responseType.
+    * This contains the type of class/entity this response contains.
+    */
+  responseType: ResponseObjectType = ResponseObjectType.AUTH;
+
   /**
   * The access_token - JWT shortterm access token.
   */