I have a request to implement a login system using local credentials + openId + facebook-connect.
Thus, the user can register / login using any of the three options.
I think using OpenId and facebook connect adds some flexibility, but in other cases it adds some limitations, since you need to integrate all the logic and make the existing differences transparent to users.
What do you think? Any good link to manage a combined login using both external mechanisms? Any famous site doing it right now?
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