RegisterController::createUserAction PHP Method

    public function createUserAction()
    {
        $parameters = $this->getRequest()->getParams();
        $user = $this->_helper->service('user')->findBy(array('email' => $parameters['email']));
        if ($user) {
            echo '0';
            exit;
        } else {
            $user = $this->_helper->service('user')->createPending($parameters['email'], $parameters['first_name'], $parameters['last_name'], $parameters['subscriber_id']);
            $this->_helper->service('email')->sendConfirmationToken($user);
            echo '1';
            exit;
        }
    }