Error:
Argument 1 passed to Illuminate\Auth\Guard::login() must implement interface Illuminate\Auth\UserInterface, null given
The problem occurs if the user data deleted from users table but this user data, id exists in the profiles table!
Check it, last post: http://laravel.io/forum/05-14-2014-cant-login-user-in-test
Laravel Facebook login error : Argument 1 passed to Illuminate\Auth\Guard::login() ...