This method is called
only if you have implemented the
IwodVPNNotify interface in your
application and the wodVPN1.Notification
property has received a reference to an instance of your implementation.
This notification method is called when user leaves the channel. At this point he will be removed from the collection of all connected users, so this is last change to access information about the user.
If disconnection was result of an error,
ErrorCode and ErrorText arguments will contain decription of the error.
Note that if UDP channel was used, UserDisconnected event may be result of user being idle for certain amount of seconds, depending on
User.Timeout property value.