Change datastore system to save when someone leaves and not when the value changes?

local datastore = game:GetService("DataStoreService")
local ds1 = datastore:GetDataStore("StageSaveSystem")

game.Players.PlayerAdded:connect(function(plr)
	local ls = Instance.new("Folder", plr)
	ls.Name = "leaderstats"
	local st = Instance.new("StringValue")
	st.Name = "Stage"
	st.Parent = ls
	st.Value = 0

 st.Value = ds1:GetAsync(plr.UserId) or 0
 ds1:SetAsync(plr.UserId, st.Value)
 
 
 st.Changed:connect(function()
 ds1:SetAsync(plr.UserId, st.Value)

end)
end)

--[[  game.Players.PlayerRemoving:Connect(function(Player)
      ds1:SetAsync(Player.UserId,Player.leaderstats["Stage"].Value)   ]]

How do i add the above^^ so it saves when someone leaves instead of saving everytime the stage.value changes? Just wanna change it because of after 30 requests of changing the stage.value the rest will be dropped and will not save.