错误代码 7503 - 应用程序未在我们的商店中注册

我尝试通过 Graph API 接收呼叫信息。准确地说 - 我尝试运行文档中的示例 5：但我只收到以下错误：

    {
    "error": {
        "code": "UnknownError",
        "message": "{\"errorCode\":\"7503\",\"message\":\"Application is not registered in our store.\",\"instanceAnnotations\":[]}",
        "innerError": {
            "date": "2021-08-20T14:34:37",
            "request-id": "1ea2bdf0-76fd-4f76-b609-61fb22cfc92b",
            "client-request-id": "1ea2bdf0-76fd-4f76-b609-61fb22cfc92b"
        }
    }
}

我的请求如下所示：

POST https://graph.microsoft.com/v1.0/communications/calls
Content-Type: application/json
{
  "@odata.type": "#microsoft.graph.call",
  "callbackUri": "https://bot.contoso.com/callback",
  "requestedModalities": [
    "audio"
  ],
  "mediaConfig": {
    "@odata.type": "#microsoft.graph.serviceHostedMediaConfig",
    "preFetchMedia": [
     {
       "uri": "https://cdn.contoso.com/beep.wav",
       "resourceId": "f8971b04-b53e-418c-9222-c82ce681a582"
     },
     {
       "uri": "https://cdn.contoso.com/cool.wav",
       "resourceId": "86dc814b-c172-4428-9112-60f8ecae1edb"
     }
    ]
  },
  "chatInfo": {
    "@odata.type": "#microsoft.graph.chatInfo",
    "threadId": "19:meeting_ZThiYjNjZjYtZGZlZC00ZTMwLTkwZTAtNTllOTQ0ZjU3Ym[email protected] /cdn-cgi/l/email-protection",
    "messageId": "0"
  },
  "meetingInfo": {
    "@odata.type": "#microsoft.graph.organizerMeetingInfo",
    "organizer": {
      "@odata.type": "#microsoft.graph.identitySet",
      "user": {
            "id": "a6acfa8d-668b-496b-8eb9-f23509fe452d",
            "@odata.type": "microsoft.graph.identity",
            "displayName": "ME",
            "tenantId": "36bf0149-5b2b-4158-896d-e409b491f89b"
        }
    },
    "allowConversationWithoutHost": true
  },
  "tenantId":"36bf0149-5b2b-4158-896d-e409b491f89b"
}

我使用Postman来调用API。我将应用程序令牌与我的 AppID、AppSecret 和我的开发租户（无用户凭据）一起使用。我的令牌具有所需的角色：

  "roles": [
    "Calls.JoinGroupCall.All",
    "Calls.InitiateGroupCall.All",
    "Calls.JoinGroupCallAsGuest.All",
    "User.Read.All",
    "Calls.AccessMedia.All",
    "Calls.Initiate.All"
  ],

因为我收到了一个令牌 - 收到错误消息“应用程序未在我们的商店中注册”对我来说没有任何意义。调用此路线是否需要注册更多应用程序？

谢谢 ：）

注册为机器人就是解决方案。