public function retrieveData($path, array $params = array(), array $opts = array())
    {
        return empty($params)
            ? $this->_processResponse($this->http->get($this->_getApiPath($opts) . $path))
            : $this->_processResponse(
                $this->http->get($this->_getApiPath($opts) . $path . "?" . http_build_query($params, '', '&'))
            );
    }