fix : unify dto conversion

dto/userresponse.dto.ts

@@ -1,6 +1,8 @@
 export class UserResponseDTO {
   constructor(partial: Partial<UserResponseDTO>) {
-    Object.assign(this, partial);
+    this.id = partial.id;
+    this.username = partial.username;
+    this.avatar = partial.avatar;
   }
   id: string;