Redirect to Google
In the previous section, you created a page which prompts the user to sign in with Google. In this section, you'll add a route which redirects the user to Google when they click the button. It won't work just yet, because there are a few other pieces that need to be put in place. Subsequent steps will add the missing functionality and everything will work by the end of this tutorial.
passport and the
passport-google-oidc strategy as dependencies.
$ npm install passport $ npm install passport-google-oidc
require() the newly installed packages, as well as
the app's database, at line 2, below
var express = require('express'); var passport = require('passport'); var GoogleStrategy = require('passport-google-oidc'); var db = require('../db');
Next, add a route that will redirect the user when they click "Sign in with
Google". Continuing within
routes/auth.js, add the following code at line 12,
Try signing in by starting the server.
$ npm start
Open http://localhost:3000, click "Sign in" and then click "Sign in with Google."
Uh oh... the app fails with an error indicating that the Google authentication strategy is unknown. That will be fixed by configuring the strategy. But first, the app needs to be registered with Google.