如何在没有外壳访问的服务器上设置谷歌OAuth 2.0？

const express = require('express');
const { google } = require('googleapis');

const app = express();

const clientId = 'YOUR_CLIENT_ID';
const clientSecret = 'YOUR_CLIENT_SECRET';
const redirectUri = 'YOUR_REDIRECT_URI';

const oauth2Client = new google.auth.OAuth2(
  clientId,
  clientSecret,
  redirectUri
);

app.get('/auth/google', (req, res) => {
  const authUrl = oauth2Client.generateAuthUrl({
    access_type: 'offline',
    scope: ['https://www.googleapis.com/auth/userinfo.email']
  });
  res.redirect(authUrl);
});

app.get('/auth/google/callback', async (req, res) => {
  const { code } = req.query;
  const { tokens } = await oauth2Client.getToken(code);
  oauth2Client.setCredentials(tokens);
  // 在这里可以使用访问令牌调用谷歌API
  res.send('授权成功！');
});

app.listen(8080, () => {
  console.log('服务器已启动，监听端口8080');
});