public function addSubscriber(Subscriber $subscriber)
{
$body = array();
$email = $subscriber->getEmail();
$phone = $subscriber->getPhoneNumber();
$country = $subscriber->getPhoneCountry();
if (!empty($email)) {
$body['email'] = $email;
}
if (!empty($phone)) {
$body['phone_number'] = $phone;
}
if (!empty($country)) {
$body['phone_country'] = $country;
}
return $this->client->send('subscribers.json', 'POST', array('Content-Type' => 'application/x-www-form-urlencoded'), array('subscriber' => $body));
}
