passport-setup.js

const passport = require('passport');
const GoogleStrategy = require('passport-google-oauth2').Strategy;

passport.serializeUser(function(user, done) {

    done(null, user);
  });
  
passport.deserializeUser(function(user, done) {
   
    done(null, user);
});

passport.use(new GoogleStrategy({
    clientID:process.env.GOOGLE_CLIENT_ID,
    clientSecret:process.env.GOOGLE_CLIENT_SECRET,
    callbackURL:process.env.CALLBACK_URL,
    passReqToCallback:true
  },
  function(request, accessToken, refreshToken, profile, done) {
    // console.log(profile)
    // console.log(`Username is : ${req.user.displayName}`);
    // console.log(typeof(profile))
    return done(null, profile);
  }
));