Fatal error: Uncaught Error: Class "GrahamCampbell\GitHub\Auth\Authenticator\AbstractAuthenticator" not found in C:\xampp\htdocs\vendor\graham-campbell\github\src\Auth\Authenticator\ApplicationAuthenticator.php:24 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\graham-campbell\github\src\Auth\Authenticator\ApplicationAuthenticator.php on line 24