Fatal error: Uncaught Error: Interface 'Illuminate\Contracts\Auth\UserProvider' not found in E:\xampp\htdocs\key1\vendor\laravel\framework\src\Illuminate\Auth\DatabaseUserProvider.php:11 Stack trace: #0 {main} thrown in E:\xampp\htdocs\key1\vendor\laravel\framework\src\Illuminate\Auth\DatabaseUserProvider.php on line 11