title: Laravel 5.1 route not defined redirect
body: <p>need to ask about error, when I tried to redirect my logout</p>
  
  <p>This is UserController:</p>
  
  <pre><code>public function logout()
  {
  
      Auth::logout();
      return redirect()-&gt;route('auth/login');
  }
  </code></pre>
  
  <p>This is my routes:</p>
  
  <pre><code>Route::get('/', function () {
      return view('welcome');
  });
  // 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::get('testing', 'UserController@test');
  Route::get('logout', 'UserController@logout');
  </code></pre>
  
  <p>I think, taht everything is ok on routes and I defined login properly (like a Laravel documentation)</p>
  
  <p>but it still take this error:</p>
  
  <pre><code>InvalidArgumentException in UrlGenerator.php line 306:
  Route [auth/login] not defined.
  </code></pre>
  
  <p>Can you please what is wrong? Did I make any mistake?</p>
  
  <p>Thanks a lot, have a nice day!</p>