Fatal error: Uncaught Error: Class "Illuminate\Foundation\Auth\User" not found in C:\xampp\htdocs\astra-backoffice\vendor\laravel\framework\tests\Integration\Auth\Fixtures\AuthenticationTestUser.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\astra-backoffice\vendor\laravel\framework\tests\Integration\Auth\Fixtures\AuthenticationTestUser.php on line 8