oauth snippet -- google strategy

import passport from "passport";
import dotenv from "dotenv";
dotenv.config();
import { Strategy as GoogleStrategy } from "passport-google-oauth20";
import { User } from "../models/User.js";

passport.serializeUser((user, done) => {
  try {
    console.log('User:', user);
    done(null, user._id);
    //payload for deserialize will be the user id
  } catch (error) {
    console.error('Error in serializeUser:', error);
    done(error, null);
  }
});

passport.deserializeUser(async (payload, done) => {
  console.log('In the deserialize function');
  console.log('Payload:', payload)
  const user = await User.findById(payload);
  console.log(user);
  done(null, user);
});

passport.use(new GoogleStrategy({
  clientID: process.env.GOOGLE_ID,
  clientSecret: process.env.GOOGLE_SECRET,
  callbackURL: process.env.GOOGLE_REDIRECT_URL,
  scope: ['profile', 'email']
}, async (accessToken, refreshToken, profile, done) => {
  const email = profile.emails[0].value;
  const user = await User.findOne({
    email: email
  });
  if (!user) {
    const newUser = new User({
      name: profile.displayName,
      email: email,
      password: 'oauth2'    //todo: change this
    });
    await newUser.save();
    done(null, newUser);
  } else
    done(null, user);
}));