Login / Signup / SignIn with Google | OAuth2.0 | Using React and Express JS

Video Description

In this video I show how to setup your Google Developer Console to create an OAuth 2.0 consent screen and OAuth2 client id credentials to allow signing in with Google. I then show where to get the official google-auth-library for creating the initializing url and verifying tokens and extracting credentials. After that I show how to setup two Express Routes! One will build the url and pass it back to our React front-end. The other will receive the reply from Google and authenticate the code. I also show how to setup your React UI to ping our backend to retrieve the built URL and ping the GoogleAuth api using the redirect! As a bonus I also show how to use this access token to request the users information from the googleapis for userinfo! I hope that you find this helpful! Opening Tokens: https://youtu.be/ChUAcV0FdvM *There is additional information in here please read thoroughly such as the following* GoogleGSI is probably easier to implement check it out here: https://www.youtube.com/watch?v=rrSfsxFq0Dw My channel membership is live check it out here!: https://www.youtube.com/channel/UCwPrPv9eS7Xgfp_wi7uxt0g/join Membership perk video: https://youtu.be/FJgKifAThdU SvelteKit OAuth2 Video: https://youtu.be/4QwcC4hfqM0 PocketBase SvelteKit OAuth2 Video Here: https://youtu.be/Ig_RMc0GFw4 *Note* Save yourself the headache and do NOT attempt to have a different a separate origin URI from your redirect URI : i.e. do NOT initiate the request from origin URI localhost:5173 and then try to redirect in your backend back to Google. Google will not send the code it will send a Cross Site Request Forgery token that you need an additional package and TONS of work (they rotate the keys), to pull out and verify! OAuth2Client docs here: https://cloud.google.com/nodejs/docs/reference/google-auth-library/latest/google-auth-library/oauth2client Need help? visit https://www.consultingninja.tech Check out my channel @ConsultingNinja for more videos like these. Requirements when using Google Sign in Docs: https://developers.google.com/identity/branding-guidelines Source Code Available Here: https://github.com/consultingninja/oAuthReactExpress Vite Video Here: https://youtu.be/6sLoJuTmqiU Express Video Here: https://youtu.be/A2cdELhQHcU 00:00 - Intro 01:27 - Google Console Setup 06:00 - ENV Setup in Express 07:32 - Express Setup 20:44 - React Setup 25:52 - Wrap-Up *post release update* Googles Documentation is not great and you should play around a bit with opening different pieces of this to see what is inside. As an example: One place in Googles docs said that the field "id_token" only had 4 properties and none of them very useful. However after opening with const ticket = await oAuth2Client.verifyIdToken({idToken: id_token,audience:process.env.CLIENT_ID,}); I found this contained all user information as well. I have found other instances of Googles docs being misleading and or inaccurate. Just a note!