laravel/app/Http/Controllers/Auth/AuthController.php

<?php namespace App\Http\Controllers\Auth;

use App\Http\Controllers\Controller;
use Illuminate\Foundation\Auth\AuthenticatesAndRegistersUsers;

class AuthController extends Controller {

	/*
	|--------------------------------------------------------------------------
	| Registration & Login Controller
	|--------------------------------------------------------------------------
	|
	| This controller handles the registration of new users, as well as the
	| authentication of existing users. By default, this controller uses
	| a simple trait to add these behaviors. Why don't you explore it?
	|
	*/

	use AuthenticatesAndRegistersUsers;

}