After Facebook signs a user in, what login name to store in the app's DB?

Question

After Facebook signs in for a user, what is a proper Login name and email to use to store this user into the app's Database?

Is there any docs on it? I haven't seen any yet. Is it the same for new JS SDK and old JS SDK?

Answer 1

every user would have a unique facebook user id number that is probably what your looking for