In my website, i've built a login system which is quite simple.. I started implementing the facebook login option and it got a bit messy,

I'm looking for some sort of framework/code sample + db structure sample of a code that bundles the whole thing. Logins/registrations via google/facebook/openid and as many others you know of.

Stackoverflow has a very similar mechanism of what I am looking for.

Anyone knows of such a system?

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