What field can I use using secure social on play! framework with facebook?
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How can I make sure that the same user has logged in? 

SecureSocial is returning the following fields:

id, isEmailVerified, avatarUrl, email, password, secret, token, authMethod


Some fields are empty, and everytime I log in the id changes. For example, once it is securesocial.provider.UserId@4bc348d3 and another time it is securesocial.provider.UserId@68a895ba. I thought of using the email address for finding out if the same user logged in, but the email address of the user can be changed in the facebook profile. So is there any other field I can use to make certain that it is the same user who logs in ?