Laravel authentication error

I am new to laravel and i have heard that login and registation system is default in laravel. But i am not being able to utilize it. I have place login and reigter views in inside Auth directory in resources/views/ I have this controller in Auth/AuthController.php

<?php

namespace App\Http\Controllers\Auth;

use App\User;
use Validator;
use App\Http\Controllers\Controller;
use Illuminate\Foundation\Auth\ThrottlesLogins;
use Illuminate\Foundation\Auth\AuthenticatesAndRegistersUsers;

class AuthController extends Controller
{


   use AuthenticatesAndRegistersUsers, ThrottlesLogins;
   private $redirectTo = '/loginpage';

   public function __construct()
   {
       $this->middleware('guest', ['except' => 'getLogout']);
   }

   protected function validator(array $data)
   {
       return Validator::make($data, [
           'name' => 'required|max:255',
           'email' => 'required|email|max:255|unique:users',
           'password' => 'required|confirmed|min:6',
       ]);
   }

   protected function create(array $data)
   {
       return User::create([
           'name' => $data['name'],
           'email' => $data['email'],
           'password' => bcrypt($data['password']),
       ]);
   }
}

The Routes are:

// Authentication routes...
Route::get('auth/login', 'Auth\AuthController@getLogin');
Route::post('auth/login', 'Auth\AuthController@postLogin');
Route::get('auth/logout', 'Auth\AuthController@getLogout');

// Registration routes...
Route::get('auth/register', 'Auth\AuthController@getRegister');
Route::post('auth/register', 'Auth\AuthController@postRegister');


Route::controllers([
   'auth' => 'Auth\AuthController',
   'password' => 'Auth\PasswordController',
]);

but i am getting this error:

FatalErrorException in AuthenticatesAndRegistersUsers.php line 11: A precedence rule was defined for Illuminate\Foundation\Auth\AuthenticatesUsers::getGuard but this method does not exist

via Chebli Mohamed