Hotfix: Missing relation bug

src/models/entities/UserGroup.ts

@@ -4,6 +4,7 @@ import {
   IsString
 } from "class-validator";
 import { ChildEntity, Column } from "typeorm";
+import { ResponsePrincipal } from '../responses/ResponsePrincipal';
 import { ResponseUserGroup } from '../responses/ResponseUserGroup';
 import { Principal } from './Principal';
 
@@ -33,7 +34,7 @@ export class UserGroup extends Principal {
   /**
    * Turns this entity into it's response class.
    */
-  public toResponse(): ResponseUserGroup {
+  public toResponse(): ResponsePrincipal {
     return new ResponseUserGroup(this);
   }
 }