GetLoggedInValue is the implementation of the LoggedIn adapter field. When a server-side script references the LoggedIn field for the current user, it generates a call to GetLoggedInValue.  

In TCustomEndUserAdapter, GetLoggedInValue checks whether the UserID property has been assigned. If UserID is an assigned Variant other than an empty string, GetLoggedInValue returns true, indicating that the user has logged in. Otherwise, GetLoggedInValue returns false.