Getting local player without unity networking.

Hello I followed a long tutorial series on youtube about making a custom server to connect to a unity client.
Since then the user has mostly shut down their channel because people were selling his work or something.
Anyways he never got to the part about attaching a camera to the local player.
I have everything else pretty much figured out but I can’t seem to figure out how to determine who the local player is. every time a new player logs in the player camera switches to them.
I tried using the unity networking local player authority but it just made my player that I was trying to instantiate null, not sure why.
But is there a way recognize the local player without needing to use that, or a better way to do this?
Also will the local player authority work even if I’m not using the unity networking hud?
I have been scratching my head for over a week trying to figure this out.

actually let me ask a better and more direct question.
How would I ignore or disallow any new instance of a camera after the first one is instantiated.
So basically when my first camera is accepted don’t change to a new one after it.