public function reset2faAction()
    {
        $user = $this->getSelectedUser();
        $user->clearTwoFactorKey();
        $this->addMessage(
                sprintf($this->_('Two factor key cleared for user %s'),
                        $user->getLoginName()),
                'success');
        $router = \Zend_Controller_Action_HelperBroker::getStaticHelper('redirector');
        $router->gotoRoute(['controller'=>'staff', 'action'=>'show'], null, false);
    }