index.js

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

const app = express();


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

app.get('/auth/google',
    passport.authenticate('google', {
        scope: ["profile", "email"]
    })
)

app.get('/auth/google/callback', passport.authenticate('google'))


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