OptionalextraAny additional information provided by the authenticator.
OptionalgroupsThe names of groups this user is a part of.
OptionaluidA unique value that identifies this user across time. If this user is deleted and another user by the same name is added, they will have different UIDs.
OptionalusernameThe name that uniquely identifies this user among all active users.
UserInfo holds the information about the user needed to implement the user.Info interface.