Just some very quick work on fb plugin:
if fb account does not have username or email, then return error and proceed no further.
if fb account has a username and this username exists in the table and there is no fb id linked to this user in the table and the email is different then return error and proceed no further.
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Hi, I've much experience of facebook API using graphi API and FBML. I've integrated and managed many fb login plugin in different websites. I've understood this spec and ready to start. Thanks
Hi, Web development expert here. I have 3+ years of experience in facebook app development. you can check my latest work here. [url removed, login to view] Thanks, Usman .