收到错误'没有授权头传递'使用PHP's POST CURL请求- envato api

我开始使用Enavato API

到目前为止，我已经创建了一个应用程序，得到client_id &client_secret并设法从https://api.envato.com/authorization获得code access_key之后，我使用下面的php代码使POST curl请求

$client_id      = '***********';
$client_secret  = '***********';
$redirect_uri   = urlencode('http://localhost:3000');
if(isset($_GET["code"])) :  
  $apiUrl = 'https://api.envato.com/token';
  $params = array(
    'grant_type'    => 'authorization_code',
    'code'          => $_GET["code"],
    'redirect_uri'  => $redirect_uri,
    'client_id'     => $client_id,
    'client_secret' => $client_secret,
  );
  $curl = curl_init();
  $f = fopen('request.txt', 'w');
  curl_setopt($curl, CURLOPT_URL, $apiUrl);
  curl_setopt($curl, CURLOPT_POST, 1);
  curl_setopt($curl, CURLOPT_VERBOSE, true);
  curl_setopt($curl, CURLOPT_HEADER, true);
  curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
  curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
  curl_setopt($curl, CURLOPT_POSTFIELDS, $params);
  curl_setopt($curl, CURLOPT_STDERR, $f);
  $result = curl_exec($curl);
  fclose($f);
  // Check if any error occurred
  if(empty($result))
  { 
    // die(curl_errno($curl));
    // die(curl_error($curl));
     $info = curl_getinfo($curl);
     echo '<br><br>';
     echo 'Took ' . $info['total_time'] . ' seconds to send a request to ' . $info['url'];
     echo '<br><br>';
     var_dump($info);
     echo '<br><br>';
  }
  var_dump($result);
  // Close handle
  curl_close($curl);
endif;

，这里是request.txt转储

* Hostname was found in DNS cache
* Hostname in DNS cache was stale, zapped
*   Trying 107.23.230.180...
* Connected to api.envato.com (107.23.230.180) port 443 (#0)
* TLS 1.2 connection using TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
* Server certificate: *.envato.com
* Server certificate: RapidSSL SHA256 CA - G3
* Server certificate: GeoTrust Global CA
> POST /token HTTP/1.1
Host: api.envato.com
Accept: */*
Content-Length: 699
Expect: 100-continue
Content-Type: multipart/form-data; boundary=------------------------1a95a06d7b815306
< HTTP/1.1 100 Continue
< HTTP/1.1 400 Bad Request
< Access-Control-Allow-Origin: *
< Cache-Control: no-store
< Content-Type: application/json; charset=utf-8
< Date: Sun, 17 May 2015 17:03:41 GMT
< Pragma: no-cache
* Server nginx/1.7.10 is not blacklisted
< Server: nginx/1.7.10
< set-cookie: connect.sid=s%3ARC9gGye-Txp4KLp67M9ESspXijYoUc8i.pT3jYHvu1WyOsSjwsuQzEsy5hLQlc2QpmHkZRm05pXo; Path=/; HttpOnly
< X-Frame-Options: Deny
< X-Powered-By: Express
< Content-Length: 80
< Connection: keep-alive
* HTTP error before end of send, stop sending
< 
* Closing connection 0

最后是错误(在JSON中获取)

字符串(80)"{"error":"invalid_request"，"error_description":"未通过授权头"}"

令人惊讶的是，每件事都与Postman一起工作，我得到了"refresh_token"answers"access_token"，状态码成功200。

我知道我错过了一些东西，但找不到什么?