Laravel 5.2: How do I display a session flash message after login/logout with the default auth setup?

Working with the default setup generated after running php artisan make:auth, I am now wondering how do I control the flash messages I need to show to a user when he logs in.

So far I have tried adding this code to the default AuthController:

 public function authenticated($request, $user)
    {
        flash('Welcome back ' . $user->username . ', you have been logged in');
    }

But this causes too many redirects error in my Chrome browser. How do I flash custom messages without creating a custom LoginController or overriding the complete login method inside AuthController?

via Chebli Mohamed