public function create($options = array()) {
        $options = new Values($options);

        $data = Values::of(array(
            'ExpirationDate' => Serialize::iso8601DateTime($options['expirationDate']),
            'Details' => $options['details'],
            'HiddenDetails' => $options['hiddenDetails'],
        ));

        $payload = $this->version->create(
            'POST',
            $this->uri,
            array(),
            $data
        );

        return new ChallengeInstance(
            $this->version,
            $payload,
            $this->solution['serviceSid'],
            $this->solution['identity'],
            $this->solution['factorSid']
        );
    }