I have successfully deployed my node.js code to smarthome by Google Actions.
I have added smarthome devices to GoogleHome App and when I operate device operations I didn't get any function logs in Google Cloud logs page.
Here is the some part of my code that I used for smarthome.
Why console.log is not happening?

/**
 * Copyright 2018 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

'use strict';

const { onRequest } = require("firebase-functions/v2/https");
const { onValueWritten } = require("firebase-functions/v2/database");
const { smarthome } = require("actions-on-google");
const { google } = require("googleapis");
const { logger } = require("firebase-functions");
const admin = require("firebase-admin");
const axios = require("axios");
const fetch = require("node-fetch");
const util = require("util");
const serviceAccount = require("");

admin.initializeApp({
  credential: admin.credential.cert(serviceAccount),
  databaseURL: ""
});
//admin.initializeApp();
const firebaseRef = admin.database().ref('/');
const auth = new google.auth.GoogleAuth({
  scopes: ['https://www.googleapis.com/auth/homegraph'],
});
const homegraph = google.homegraph({
  version: 'v1',
  auth: auth,
});
// Hardcoded user ID
const USER_ID = '102';

exports.login = onRequest((req, res) => {
  if (req.method === 'GET') {
    logger.log('Starting of GET ');
    logger.log('Requesting login page');
    res.send(`
    
      
      
        

          
          
            Link this service to Google
          
        
      
    
  `);
  logger.log('%s',req.query.responseurl);
  } else if (req.method === 'POST') {
    const responseurl = decodeURIComponent(req.body.responseurl);
    logger.log('__POST__START_%s',req.body.responseurl);
    logger.log(`Redirect to ${responseurl}`);
    return res.redirect(responseurl);

  } else {
    // Unsupported method
    res.send(405, 'Method Not Allowed');
  }
});

exports.fakeauth = onRequest((request, response) => {
  const responseurl = util.format('%s?code=%s&state=%s',
      decodeURIComponent(request.query.redirect_uri), 'xxxxxx',
      request.query.state);
  logger.log(`Set redirect as ${responseurl}`);
  logger.log('Ending of FAKEAUTH');
  return response.redirect(
      `/login?responseurl=${encodeURIComponent(responseurl)}`);

});

exports.faketoken = onRequest((request, response) => {
  const grantType = request.query.grant_type ?
    request.query.grant_type : request.body.grant_type;
  const secondsInDay = 86400; // 60 * 60 * 24
  const HTTP_STATUS_OK = 200;
  logger.log(`Grant type ${grantType}`);

  let obj;
  if (grantType === 'authorization_code') {
    obj = {
      token_type: 'bearer',
      access_token: '123access',
      refresh_token: '123refresh',
      expires_in: secondsInDay,
    };
  } else if (grantType === 'refresh_token') {
    obj = {
      token_type: 'bearer',
      access_token: '123access',
      expires_in: secondsInDay,
    };
  }
  response.status(HTTP_STATUS_OK)
      .json(obj);
});

const app = smarthome();
app.onSync(async (body, headers) => {
  
  const authorizationHeader = headers.authorization;
  const accessToken = authorizationHeader.split(' ')[1];
  console.log('----onSync accessToken', accessToken);
  let medhaResponse;

});