ustk-todolist/src/routes/google.js

const express = require("express");
const passport = require("passport");

const router = express.Router();

const asyncHelper = require("../asyncHelper");

router.get(
    "/google",
    passport.authenticate("google", {
        scope: ["https://www.googleapis.com/auth/plus.login"],
    }),
);

router.get(
    "/google/callback",
    passport.authenticate("google", { session: false, failWithError: true }),
    asyncHelper(async (req, res) => {
        res.redirect(`/login?jwt=${req.user.generateJwt()}`);
    }),
);

module.exports = router;