How to make a command that teleports you to the player regardless of server

Now this might be confusing. BUT this command is similar to how rejoining works, but with being able to join to the player that you put in the command. I want this command so I can be able to join people/exploiters/hackers and so on, so how do I do this? I know it’s possible.

look on
TeleportService:GetPlayerPlaceInstanceAsync
and
TeleportService:TeleportToPlaceInstance

I’ll go check them out tomorrow but thanks!