Fatal error: Uncaught Error: Interface 'Illuminate\Contracts\Auth\UserProvider' not found in /home/wwiwil/apps/iwill-laravel/vendor/laravel/framework/src/Illuminate/Auth/DatabaseUserProvider.php:13 Stack trace: #0 {main} thrown in /home/wwiwil/apps/iwill-laravel/vendor/laravel/framework/src/Illuminate/Auth/DatabaseUserProvider.php on line 13