I have no interest in building a new code path to support Google login, when I can use the OAuth setup I'm already using for 3 providers (inc. Google). It would be nice if you'd just post the CSS or PNGs you're branding as Google Login and let me use the backend I've already plumbed.
I found the actual button design guidelines, and noticed that their launch partners (FitBit and The Fancy) have designed their own buttons in the same style as Google's JS buttons.
https://developers.google.com/accounts/docs/OAuth2WebServer
According to these new docs, I need to use the Google+ JS to do client-side authentication, then pass the token to my server:
https://developers.google.com/+/web/signin/server-side-flow
I have no interest in building a new code path to support Google login, when I can use the OAuth setup I'm already using for 3 providers (inc. Google). It would be nice if you'd just post the CSS or PNGs you're branding as Google Login and let me use the backend I've already plumbed.