Authenticate to Google API with Node JS

Question

What I have so far is the app redirects to the consent page. The user accepts, then I\'m redirected back to localhost with a valid authorization code. From what I understa

Answer 1

The Dummy's Guide to 3-legged Google OAuth.

Literally everything you need to know is on this single page https://developers.google.com/identity/protocols/OAuth2WebServer . Read it twice and you'll be an OAuth ninja. In summary, it says ...

1. Construct an accounts.google.com URL with 4 query params :-
   1. client_id to identify your app
   2. scope to say what permissions you're asking for
   3. redirect_uri to tell Google where to redirect the user's browser with the result
   4. response_type=code to say you want an Auth Code
2. redirect the user's browser to that URL
3. Have a sip of coffee while the user logs in, chooses his Google account, and grants permission, until eventually ...
4. The user's browser gets redirected back to your app's redirect_uri, with a query param of code which is the one-time Auth Code
5. Post the Auth Code to Google's token endpoint
6. Parse the JSON response to get the Access Token
7. Use the Access Token in a "authorization: bearer access_token" http header for your subsequent Google API requests

If you go to https://developers.google.com/oauthplayground/ you can run through the steps online to see what the various URLs and responses look like.