Fatal error: Uncaught Error: Interface "Illuminate\Contracts\Auth\UserProvider" not found in D:\Apache24\www\lupin\back-end\vendor\laravel\framework\src\Illuminate\Auth\DatabaseUserProvider.php:12 Stack trace: #0 {main} thrown in D:\Apache24\www\lupin\back-end\vendor\laravel\framework\src\Illuminate\Auth\DatabaseUserProvider.php on line 12