使用EWS

Question

我正在尝试使用oauth 2加载电子邮件列表。以下是我的代码：

    <?php

require_once "vendor/autoload.php";

use src\API\Type;
use garethp\ews\MailAPI as API;

$token='EwA......';    //access token

$api = API::withCallbackToken('outlook.office365.com', $token);
$mail = $api->getMailItems();
  foreach ($mail as $email) {
    $email = $api->getItem($email->getItemId());
    $email_id=$email->getItemId(); 
    $subject = $email->getSubject();
        $sender = $email->getSender()->getMailbox()->getEmailAddress();
        $body = (string) $email->getBody();

    echo $body;
} 

但得到的回应如下：

  

致命错误：未捕获的garethp \ ews \ API \ Exception \ UnauthorizedException   在   C：\的Inetpub \ wwwroot的\ bephpforTteam \新建\ php_ews \ PHP-EWS-主的\ src \ API \ ExchangeWebServices.php：438   堆栈跟踪：＃0   C：\的Inetpub \ wwwroot的\ bephpforTteam \新建\ php_ews \ PHP-EWS-主\ SRC \ API \ ExchangeWebServices.php（356）：   garethp \ EWS \ API \ ExchangeWebServices-＆GT; handleNonSuccessfulResponses（NULL，   401）＃1   C：\的Inetpub \ wwwroot的\ bephpforTteam \新建\ php_ews \ PHP-EWS-主\ SRC \ API \ ExchangeWebServices \ MiddlewareFactory.php（57）：   garethp \ ews \ API \ ExchangeWebServices-＆gt; processResponse（NULL）＃2   C：\的Inetpub \ wwwroot的\ bephpforTteam \新建\ php_ews \ PHP-EWS-主\ SRC \ API \ ExchangeWebServices.php（497）：   garethp \ EWS \ API \ ExchangeWebServices-＆GT; garethp \ EWS \ API \ ExchangeWebServices {闭合}（对象（garethp \ EWS \ API \ MiddlewareRequest），   对象（关闭））＃3   C：\的Inetpub \ wwwroot的\ bephpforTteam \新建\ php_ews \ PHP-EWS-主\ SRC \ API \ ExchangeWebServices \ MiddlewareFactory.php（66）：   garethp \ ews \ API \ ExchangeWebServices-＆gt; garethp \ ews \ API {closure}（对象（garethp \ ews \ API \ MiddlewareRequest））＃4 C：\ inetpub \ wwwroot \ bephpforTt in C：\ inetpub \ wwwroot \ bephpforTteam \新建\ php_ews \ PHP-EWS-主的\ src \ API \ ExchangeWebServices.php   在第438行