public function createEmailVerificationTicket($user_id, $result_url = null)
{
$body = array('user_id' => $user_id);
if ($result_url !== null) {
$body['result_url'] = $result_url;
}
$request = $this->apiClient->post()->tickets()->addPath('email-verification')->withHeader(new ContentType('application/json'))->withBody(json_encode($body));
return $request->call();
}