Added the ability to manage a group of users.

app/Contracts/ServiceResultError.php

@@ -1,5 +1,4 @@
-<?php
-declare(strict_types=1);
+<?php declare(strict_types=1);
 
 namespace App\Contracts;
 
@@ -8,5 +7,6 @@ interface ServiceResultError
     public function getCode(): ?int;
     public function getMessage(): string;
     public function getErrors(): array;
+    public function getErrorsOrMessage(): array|string;
     public function getData(): array;
 }