public function verify($params = null)
    {
        $requestor = new Requestor($this->_apiKey);
        $url = $this->instanceUrl() . '/verify';
        list($response, $apiKey) = $requestor->request('get', $url, $params);
        if (isset($response['address'])) {
            $verified_address = Util::convertToEasyPostObject($response['address'], $apiKey);
            if (!empty($response['message'])) {
                $verified_address->message = $response['message'];
                $verified_address->_immutableValues[] = 'message';
            }

            return $verified_address;
        } else {

            return Util::convertToEasyPostObject($response, $apiKey);
        }
    }