Standard\Controllers\UsersController::upsertUserAction PHP Метод

    public function upsertUserAction($id = null)
    {
        $data = ['groups' => $this->gk_groups, 'groupnames' => []];
        if ($id) {
            $user = Gatekeeper::findUserById($id);
            if (!$user) {
                $this->flasher->error('User with ID ' . $id . ' not found!');
                $this->redirect('/users');
            }
            $data['user'] = $user;
            foreach ($user->groups as $group) {
                $data['groupnames'][] = $group->name;
            }
        }
        echo $this->twig->render('users/upsert.twig', $data);
    }