public function getContactByEmail($email)
    {
        $url = $this->getApiEndpoint() . self::REST_CONTACTS . $email;
        $this->setUrl($url)
            ->setVerb('GET');

        $response = $this->execute();

        if (isset($response->message)) {
            $message = 'GET CONTACT BY email : ' . $email . ' '
                . $response->message;
            $this->helper->debug('getContactByEmail', [$message]);
        }

        return $response;
    }