Dialogflow es 与google assistant链接的帐户未在apprequest中获取accessToken

我已经在google actions中实现了帐户链接。我选择了具有隐式链接类型的OAuth。我已将我的帐户链接，但在随后的通话中我无法获得访问令牌。谷歌文档中写道：“谷歌为您的服务获得访问令牌后，谷歌将把令牌作为AppRequest的一部分附加到您后续的操作调用中。”请求中的用户信息应采用以下格式：

{
user : {
  "idToken": string,
  "profile": {
    object (UserProfile)
  },
  "accessToken": string,
  "permissions": [
    enum (Permission)
  ],
  "locale": string,
  "lastSeen": string,
  "userStorage": string,
  "packageEntitlements": [
    {
      object (PackageEntitlement)
    }
  ],
  "userVerificationStatus": enum (UserVerificationStatus)
}
}

{
user : {
  "idToken": string,
  "profile": {
    object (UserProfile)
  },
  "accessToken": string,
  "permissions": [
    enum (Permission)
  ],
  "locale": string,
  "lastSeen": string,
  "userStorage": string,
  "packageEntitlements": [
    {
      object (PackageEntitlement)
    }
  ],
  "userVerificationStatus": enum (UserVerificationStatus)
}
}

谷歌apprequest格式：

但我得到的请求不包含任何accessToken

{
user:
   { locale: 'en-GB',
     params: {},
     accountLinkingStatus: 'LINKED',
     verificationStatus: 'VERIFIED',
     packageEntitlements: [],
     lastSeenTime: '2020-11-09T09:07:54Z' }
} 

---

google帐户链接文档：

我在应用程序请求的标题中找到了访问令牌

授权：'Bearer'

headers:
   { host: '5cf1a2690f0c.ngrok.io',
     'user-agent': 'Google-ActionsOnGoogle/1.0',
     'content-length': '885',
     'accept-encoding': 'gzip,deflate,br',
     authorization: 'Bearer < accesstoken >',
     'content-type': 'application/json;charset=UTF-8',
     'google-actions-api-version': '3',
     'google-assistant-signature':
      '< google-assistant-signature >',
     'x-forwarded-for': '66.249.84.212',
     'x-forwarded-proto': 'https' }