文档签名 PHP API 登录示例不起作用

我没有成功使用PHP API登录文档。我收到错误 超时。但最有趣的是，我能够通过 REST 客户端登录在标题如下的地址上

https://demo.docusign.net/restapi/v2/login_information

X-DocuSign-Authentication: <DocuSignCredentials><Username>zzzzzzz@yyyy.com</Username><Password>somepasss</Password><IntegratorKey>TEST-xxxxxxxxxxxxxxxxxxxx</IntegratorKey></DocuSignCredentials>Accept: application/json  Content-Type: application/json

有人知道这个错误原因吗？（PHP配置，模块扩展？防火墙？地理位置限制？)

 Fatal error: Uncaught exception 'DocuSign'eSign'ApiException' with message 'API call to https://demo.docusign.net/restapi/v2/login_information timed out: a:26:{s:3:"url";s:54:"https://demo.docusign.net/restapi/v2/login_information";s:12:"content_type";N;s:9:"http_code";i:0;s:11:"header_size";i:0;s:12:"request_size";i:0;s:8:"filetime";i:-1;s:17:"ssl_verify_result";i:1;s:14:"redirect_count";i:0;s:10:"total_time";d:0.842999999999999971578290569595992565155029296875;s:15:"namelookup_time";d:0.51500000000000001332267629550187848508358001708984375;s:12:"connect_time";d:0.6870000000000000550670620214077644050121307373046875;s:16:"pretransfer_time";d:0;s:11:"size_upload";d:0;s:13:"size_download";d:0;s:14:"speed_download";d:0;s:12:"speed_upload";d:0;s:23:"download_content_length";d:-1;s:21:"upload_content_length";d:-1;s:18:"starttransfer_time";d:0;s:13:"redirect_time";d:0;s:12:"redirect_url";s:0:"";s:10:"primary_ip";s:14:"162.248.186.25";s:8:"certinfo";a:0:{}s:12:"primary_port";i:443;s:8:"local_ip";s:13:"192.168.1.126";s:10:"local in C:'xampp'htdocs'localbits'ds'docusign'src'ApiClient.php on line 233
( ! ) DocuSign'eSign'ApiException: API call to https://demo.docusign.net/restapi/v2/login_information timed out: a:26:{s:3:"url";s:54:"https://demo.docusign.net/restapi/v2/login_information";s:12:"content_type";N;s:9:"http_code";i:0;s:11:"header_size";i:0;s:12:"request_size";i:0;s:8:"filetime";i:-1;s:17:"ssl_verify_result";i:1;s:14:"redirect_count";i:0;s:10:"total_time";d:0.842999999999999971578290569595992565155029296875;s:15:"namelookup_time";d:0.51500000000000001332267629550187848508358001708984375;s:12:"connect_time";d:0.6870000000000000550670620214077644050121307373046875;s:16:"pretransfer_time";d:0;s:11:"size_upload";d:0;s:13:"size_download";d:0;s:14:"speed_download";d:0;s:12:"speed_upload";d:0;s:23:"download_content_length";d:-1;s:21:"upload_content_length";d:-1;s:18:"starttransfer_time";d:0;s:13:"redirect_time";d:0;s:12:"redirect_url";s:0:"";s:10:"primary_ip";s:14:"162.248.186.25";s:8:"certinfo";a:0:{}s:12:"primary_port";i:443;s:8:"local_ip";s:13:"192.168.1.126";s:10:"local_port";i:38524;} in C:'xampp'htdocs'localbits'ds'docusign'src'ApiClient.php on line 233

PHP代码如下：

<?php
require_once('./docusign/autoload.php');
class DocuSignSample
 {
public function login()
{
    $username = "__some email__";
    $password = "__some password___";
    $integrator_key = "TEST-xxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
    $host = "https://demo.docusign.net/restapi";
    $config = new DocuSign'eSign'Configuration();
    $config->setHost($host);
    $config->addDefaultHeader("X-DocuSign-Authentication", "{'"Username'":'"" . $username . "'",'"Password'":'"" . $password . "'",'"IntegratorKey'":'"" . $integrator_key . "'"}");
    $apiClient = new DocuSign'eSign'ApiClient($config);
    $authenticationApi = new DocuSign'eSign'Api'AuthenticationApi($apiClient);
    $options = new 'DocuSign'eSign'Api'AuthenticationApi'LoginOptions();
    $loginInformation = $authenticationApi->login($options);
    if (isset($loginInformation) && count($loginInformation) > 0) {
        $loginAccount = $loginInformation->getLoginAccounts()[0];
        if (isset($loginInformation)) {
            $accountId = $loginAccount->getAccountId();
            if (!empty($accountId)) {
                echo $accountId;
            }
        }
    }
}
}
$dss = new  DocuSignSample();
$dss->login();
?>