[ Need Help ] more traffic and pedestrians

does anyone know how to this Script/mod https://www.gta5-mods.com/misc/prodigy-s-more-peds-and-traffic-mod work for fiveM? ive tried looking for a script and even doing it myself but no luck if cant something like it

trafficDensity = 0.9
pedDensity = 0.9
Citizen.CreateThread(function()
	while true do
	    SetVehicleDensityMultiplierThisFrame(trafficDensity)
	    SetPedDensityMultiplierThisFrame(pedDensity)
	    SetRandomVehicleDensityMultiplierThisFrame(trafficDensity)
	    SetParkedVehicleDensityMultiplierThisFrame(trafficDensity)
	    SetScenarioPedDensityMultiplierThisFrame(pedDensity, pedDensity)
	    
	Citizen.Wait(0)
	end
end)

You could do this, at the top 1.0 is the most, and 0.1 is the lowest

Would this be a server.lua file or client.lua?

client script.