Laravel 5.2 with GCM push notification

I am trying to build a chat application.

I am using laravel 5 as back end and android device as my front end.

I am following this tutorial. They are using slim framework, But I am using laravel 5. I need to include GCM(Google Push Notification) into laravel so I am using this package click here. But they have give a variable deviceToken. I don't know how they are generating and sending push notification.

Any help would be appreciated. Thank you.

via Chebli Mohamed