( important for facebook login )Create new app
You will get app id and secrent and follow the steps as given in image below

Visit app\config\packages\artdarek\oauth-4-laravel open config.php
Provide you app id and app secure there
Save the file

Click on Create New Client ID
Provide details as given in image

Visit app\config\packages\artdarek\oauth-4-laravel open config.php
Provide you app id and app secure there
Save the file