Route Group Prefix : Parse error: syntax error, unexpected ';'

Newbie here. I'm trying to use a prefix for the first time.

 Route::get('/', function () {
    return view('welcome');
});

Auth::routes();

Route::get('/home', 'HomeController@index');

Route::group(['prefix' => 'admin','middleware' => ['admin']], funtion(){
  Route::get('/users', 'AdminUserController@index');
  Route::get('/users/create', 'AdminUserController@create');
  Route::get('/users/{id}', 'AdminUserController@store');
  Route::get('/users/profile', function());

I keep getting this error:

[Symfony\Component\Debug\Exception\FatalThrowableError] Parse error: syntax error, unexpected ';'

I've commented out all the 'route' 'get' and still get the error

via Jeff Winkler