Before install this package, please make sure your application FACEBOOK_CLIENT_ID, GOOGLE_CLIENT_ID exist in .env if you want to login with Google, Facebook and after that insert in services.php

'facebook' => [
    'client_id' => env('FACEBOOK_CLIENT_ID', ''),
    'client_secret' => env('FACEBOOK_CLIENT_SECRET', ''),
    'redirect' => env('FACEBOOK_CALLBACK_URL', ''),
    'scopes' => ['email', 'public_profile'],
],

'google' => [
    'client_id' => env('GOOGLE_CLIENT_ID', ''),
    'client_secret' => env('GOOGLE_CLIENT_SECRET', ''),
    'redirect' => env('GOOGLE_CALLBACK_URL', ''),
    'scopes' => ['profile email'],
]

or any services if you want to use example github, gitlab, etc...