Действия в google, привязка аккаунта Oauth

'use strict';
var _ = require('lodash');

var path = require('path')
var express = require('express')
var http = require('http')
const bodyParser = require('body-parser');


var expressApp = express().use(bodyParser.json());

var server = http.createServer(expressApp).listen(3000)

const {
    dialogflow,
    SignIn
} = require('actions-on-google');


const app = dialogflow({
    debug: true,
    clientId: '7b4a6dfc-4b35-11e9-8646-d663bd873d93'
});

app.intent('Start Sign-in', conv => {
    conv.ask(new SignIn());
});

app.intent('Get Sign-in', (conv, params, signin) => {
    console.info("get sign in ");
    console.info(JSON.stringify(signin));
    if (signin.status === 'OK') {
        const access = conv.user.access.token 
        console.info("the access token is " + access);
        conv.ask('Great, thanks for signing in! What do you want to do next?');
    } else {
        conv.ask('I wont be able to save your data, but what do you want to do next?.');
    }
});

{"@type":"type.googleapis.com/google.actions.v2.SignInValue","status":"OK"}
the access token is undefined
Response {
  "status": 200,
  "headers": {
    "content-type": "application/json;charset=utf-8"
  },
  "body": {
    "payload": {
      "google": {
        "expectUserResponse": true,
        "richResponse": {
          "items": [
            {
              "simpleResponse": {
                "textToSpeech": "Great, thanks for signing in! What do you want to do next?"
              }
            }
          ]
        }
      }
    }
  }
}

"user": {
    "raw": {
      "lastSeen": "2019-03-20T12:46:23Z",
      "locale": "en-US",
      "userId": "okdhyeGSk5tofgLjEepIUrA6mmewCESY8MjklZRPvQJgv6-uybfPobwdfgtrGZJ3bE2sM9ninhst"
    },
    "storage": {},
    "_id": "okdhyeGSk5tofgLjEepIUrA6mmewCESY8MjklZRPvQJgv6-uybfPobwdfgtrGZJ3bE2sM9ninhst",
    "locale": "en-US",
    "permissions": [],
    "last": {
      "seen": "2019-03-20T12:46:23.000Z"
    },
    "name": {},
    "entitlements": [],
    "access": {},
    "profile": {}
  }