Using composer require the package vinelab/social-auth.
Edit app.php and add 'Vinelab\Auth\AuthServiceProvider' to the 'providers' array.
It will automatically alias itself as SocialAuth which is a Facade.
Publish the configuration file using php artisan vendor:publish
<?php
// start the authentication process
$provider = 'facebook';
// inital authentication route
SocialAuth::authenticate($provider);
// callback route should do this
$profile = SocialAuth::profile($provider, Input::get());
$profile->provider(); // facebook
$profile->info(); // the facebook profile information