[Networking] (Client) Unique User Identification Number

Newbie & Debugging Questions
#1

Hello JGO before I dig in on this I was wondering how I should go about giving each client that connects a Unique ID.
(Abstract / importable networking kit)

Not like:
Client #0 ID: 937
Client #1 ID: 238

But rather in 1 + 1 order:
Client #0 ID: 0
Client #1 ID: 1

The part that I think will confuzzle me is when a client disconnects.
Before I post any code that will probably make no sense, Iā€™d like some feedback on a good approach to take on achieving this :slight_smile:

Thanks JGO, hope somebody can help ~_^