$h = curl_init('https://oa.dnc.global/userinfo');
    curl_setopt($h, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($h, CURLOPT_TIMEOUT, 10);
    curl_setopt($h, CURLOPT_HTTPHEADER, 
                        array('Authorization: Bearer ' 
                        . $access_token));
    $res = curl_exec($h);