我正在学习stephen grider的全栈react课程，一切看起来都很好，但在google social auth之后，我看不到新的users集合被添加到mLab数据库中。
我使用的是passport.js和mongoose.js。
下面是相关的源代码：

• index.js*

const express = require('express');
const mongoose = require('mongoose');
const keys = require('./config/keys');
require('./models/User');
require('./services/passport');

mongoose.connect(keys.mongoURI);

const app = express();

require('./routes/authRoutes')(app);

const PORT = process.env.PORT || 5000;
app.listen(PORT)

字符串

• user.js*

const mongoose = require('mongoose');
const { Schema } = mongoose;

const userSchema = new Schema({
  googleId: String
});

mongoose.model('users', userSchema);

型

• passport.js*

const passport = require('passport');
const GoogleStrategy = require('passport-google-oauth20').Strategy;
const mongoose = require('mongoose');
const keys = require('../config/keys');

const User = mongoose.model('users');

passport.use(
  new GoogleStrategy(
    {
      clientID: keys.googleClientID,
      clientSecret: keys.googleClientSecret,
      callbackURL: '/auth/google/callback'
    },
    (accessToken, refreshToken, profile, done) => {
      new User({ googleId: profile.id }).save();
      console.log('accessToken',accessToken,'profile',profile)
    }
  )
);

型
有没有人可以告诉我，我在哪里犯了错误，因为MongoDB数据库中没有创建新的集合？