curl post php 403禁止

Question

我想使用POST方法和curl excute发布我的数据，但结果是

  

403 - 禁止访问：拒绝访问。
您无权访问   使用您提供的凭据查看此目录或页面。

$request='';
$url='https://app.highwire.com/api/auth';
$header=array('mydata');
$con = curl_init();

    curl_setopt($con, CURLOPT_URL, $url);
    curl_setopt($con, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($con, CURLOPT_SSL_VERIFYHOST, 0);
    curl_setopt($con, CURLOPT_HEADER, true);
    curl_setopt($con, CURLOPT_HTTPHEADER, $header);
    curl_setopt($con, CURLOPT_POST, 1);
    curl_setopt($con, CURLOPT_POSTFIELDS, $request);
    curl_setopt($con, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($con, CURLOPT_FAILONERROR, 0);
    curl_setopt($con, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6');
    $res = curl_exec($con);
    curl_close($con);