Disconnecting players in UNET

Hey so I'm making a game where its 1v1 and when someone disconnects I would like it to do it without a billion errors

I'm using a Network Manager (Custom) but OnPlayerDisconnected() uses the NetworkPlayer which is deprecated

What override should I use & How do I disconnect them nicely

Code (CSharp):

1. private void OnPlayerDisconnected(NetworkPlayer player)
2. {
3.         // Stop Game
4. }