Private $user_id and $config causes bugs in rwmb_profile_before_save_user

Hi,

After you last release, the var $user_id and $config became private in the User class. But we can't use them anymore in the hooks rwmb_profile_before_save_user and rwmb_profile_after_save_user : the argument $object has these 2 private variables unreachable for testing or if conditions.

Maybe you should add two getter variables or change these var for public type ?

Thanks,