Fixed failing test on the backend

Author: danias

backend/src/lib/infra/nest-auth-passport/users/user-registered.integration-event.ts

@@ -23,6 +23,7 @@ export class UserRegisteredIntegrationEvent
       context: {},
       correlationId: asyncLocalStorage.getStore()?.get('correlationId'),
     };
-    Object.assign(this, payload, this.metadata);
+    this.payload = payload;
+    Object.assign(this, this.payload, this.metadata);
   }
 }