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;
}
}