I need users to sign in client side to access their Google data. From what I gather, how it works now is that when the user signs in that gets an authorization from Google which automatically passes back to the server side. They are changing that so that the token will need to be passed to the server manually.
So the process I describe here - Google OAuth & Photos API Tutorial - Part Two: Google Login will no longer work because that’s a client side login.
Maybe this is helpful - https://developers.google.com/identity/oauth2/web/guides/migration-to-gis#authorization_code_flow_examples