Holds the relative index of the user.

A Long value.  

object.Index

The Index Property syntax has these parts:

The value of the Index property is generated by wodVPN for each user that connection. However, you should not use this value for more than one access to user's object, since it can dynamically change as users connect and disconnect. It is much safer to use ID property instead which is unique.

Indexes can change during the lifetime of the session, as they are relative to other users connected to the same channel.