How would you stop a character from spawning?

In a game I'm working on, there's a multiplayer battle system. In this battle system, a GUI is on the screen that you use to fight. However, if you reset, the GUI is disabled when you spawn. Meaning if you reset, you won't be able to participate in the battle. What can I do to make it so the player won't be able to reset themselves?

Thanks!

if i remember correctly you do this

game:GetService("StarterGui"):SetCore("ResetButtonCallback", false)