/**
* @param string $apiKey
* @param string $secretKey
* @param string $label
* @throws Exception
*/
public function __construct($apiKey, $secretKey, $label = NULL)
{
parent::__construct($label);
$this->setApiKey($apiKey);
$this->setSecretKey($secretKey);
$this->setOmitted();
$this->addRule(array($this, 'validateRecaptcha'), '');
}