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Ahh cool, then it would be nice if a person could attach it to their user profile. I am guessing it will take an extra profile field to store the Facebook ID# so that you can connect them. I would guess you would want to have the person double check their ID by having to re-enter their normal xoops password or something of the nature. Then any time they log in with facebook it will use their xoops account and user name.
You could also have it setup that when a person logs in with facebook and has no xoops user account that they then can register and verify all in one step with the facebook login information being transferred where possible.
Attending College working towards Bachelors in Software Engineering and Network Security.