How do i implement ‘sign in with google’ on my site?
On my site I would like to allow users to sign in with a google account. I plan to use openid but I would like to allow signing in with google because it has more benefits. I've noticed in the past a few sites that have the ability to sign in with a google (gmail) account and IIRC though they did NOT support openID (but I could be wrong).
How do I implement 'sign in with google' ?
Answer
If you plan to use OpenID, use that. Google is already an OpenID 2.0 provider.
Google's OpenID provider is located at: https://www.google.com/accounts/o8/ud
(NOTE: There's no point visiting that URI in your browser, but it does work for OpenID.)
This is primarily addressed on the Accounts API page, which also addresses OAuth and the hybrid and proprietary login systems. Depending on your site, you may also want to use Friend Connect, which is an OpenSocial container that internally uses OpenID for authentication.
I'm of course biased towards Friend Connect, since I'm the DPE for that project, but you're probably better served directly using the OpenID provider unless you're also doing stuff that involves a social graph.