How would you make a rays position based on the center of your screen?

I am working on a mobile FPS and am trying to figure out how I would make it so when a player presses a button it will shoot a ray based on the center of the players screen rather than mouse position. Like how Arsenal mobile works when shooting.

--Shoot
newGui.Shoot.MouseButton1Down:Connect(function()
	event:FireServer(false, "Use Center of screen, not touch position")
end)