I have a special use case I can not solve. When the user click on Facebook Connect
and find an similar email in my DB. I want to ask the user if the account belongs to him.
If the answer is yes, he needs to connect with his account and then add the Facebook ID
in the DB.
If the answer is no, I create a new user in the DB and log in.
I don't find the best way to do this. Can someone help me ?