This property is used to get reference (to access) of
some user from collection of all currently connected users,
based on UID he
was assigned when he connected to the server. Once user
connects to your server, new SSHUser object will be created
and known information will be stored in that object, such
as his IP
address and time when he connected.
Later on, as he issues new commands, more information is
stored in that object, such as his username and password (if user
provided them).
UIDs
Property
