As standard template folders views/auth/login.blade.php and register.blade.php set the auth.
Add loginView and registerView properties so you can switch between templates.
/app/Http/Auth/AuthController.php
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, ThrottlesLogins;
/**
* Where to redirect users after login / registration.
*
* @var string
*/
protected $redirectTo = '/';
/**
* Show the application login / registration form.
*
* @var string
*/
protected $loginView = 'template1.login';
protected $registerView = 'template1.register';
/**
* Create a new authentication controller instance.
*
* @return void
*/
public function __construct()
{
//switch templates
$this->loginView = config('template.name').".login";
$this->registerView = config('template.name').".register";
$this->middleware('guest', ['except' => 'logout']);
}