User.prototype.member()

Returns true if the user’s registration on the context website is active.

This is one of the few methods to get the users’s registration status. The full list is:

user.anonymous()
user.notRegistered()
user.pending()
user.member()
user.banned()

Note that for any given user, only one of the above methods returns true.

Note that there is a special case, when the user has been invited, which is not an accessible registration mode. This is to avoid leaking the visitor’s identity without his/her consent.