在laravel 5.2中使用auth中间件组限制路由

I'm trying to prevent people from accessing the /dashboard route unless they're authenticated(logged in). I looked at the laravel docs and here's what I thought I was supposed to do to accomplish this.

Route::group(['middleware' => 'auth'], function (){
    Route::get('/dashboard', [
        'uses' => 'UserController@getDashboard',
        'as' => 'dashboard'
    ]);
});

You don't need to add that extra middleware in the route. Just use the group and you'll be fine. You can see here: https://laravel.com/docs/5.1/routing#route-groups

Route::group(['middleware' => 'auth'], function () {
    // User needs to be authenticated to enter here.
    Route::get('/', function ()    {
        // Uses Auth Middleware
    });

    Route::get('user/profile', function () {
        // Uses Auth Middleware
    });
});