how do you make a player data save system?

i am working on a system that saves player data when a player leaves or joins, but it doesn't seems to be working, but I not getting any errors and it says its saving properly, how do I fix it?

local DataStoreService = game:GetService("DataStoreService")
local Stage =  DataStoreService:GetDataStore("Stage")

local player
local playerid
local usertable

game.Players.PlayerAdded:Connect(function(plr)
	player = plr.Name
	playerid = plr.UserId
	
	usertable = 'player_' .. playerid
	
	local success , currentlevel = pcall(function()
		return Stage:GetAsync(usertable)
	end)
		
	if success then
		game.ReplicatedFirst.Level.Value = Stage
		print('data loaded:' .. game.ReplicatedFirst.Level.Value)
	else
		print('ok that dident work')
	end
end)

game.Players.PlayerRemoving:Connect(function()
	local success , Stage = pcall(function()
		Stage:SetAsync(usertable,game.ReplicatedFirst.Level.Value)
	end)
	
	if success then
		print('data saved: ' .. game.ReplicatedFirst.Level.Value)
	end
end)

local breathingName = "HaveBreathing"
local birdName = "HaveBird"
local DataStore = game:GetService("DataStoreService"):GetDataStore("TestDataStore")

game.Players.PlayerAdded:Connect(function(player)

	local folder = Instance.new("Folder")
	folder.Name = "bool"
	folder.Parent = player
	
	local havebird = Instance.new("IntValue")
	havebird.Name = birdName
	havebird.Parent = folder

	local havebreathing = Instance.new("IntValue")
	havebreathing.Name = breathingName
	havebreathing.Parent = folder

	local ID2 = breathingName.."-"..player.UserId
	local ID1 = birdName.."-"..player.UserId
	
	local savedData = nil
	
	pcall(function()
		savedData = DataStore:GetAsync(ID2)
		savedData = DataStore:GetAsync(ID1)
	end)
	if savedData ~= nil then
		havebird.Value = savedData
		havebreathing.Value = savedData
		print("Data loaded")
	else
		havebreathing.Value = 0
		havebird.Value = 0
		print("New player to the game")
	end
end)

game.Players.PlayerRemoving:Connect(function(player)
	local ID2 = breathingName.."-"..player.UserId
	local ID1 = birdName.."-"..player.UserId
	DataStore:SetAsync(ID1,player.bool[breathingName].Value)
	DataStore:SetAsync(ID2,player.bool[birdName].Value)
end)

game:BindToClose(function()
	
	-- When game is ready to shutdown
	
	for i, player in pairs(game.Players:GetPlayers()) do
		if player then
			player:Kick("This game is shutting down")
		end
	end
	
	wait(5)	
	
end)

I personally write all my DataStores in a dictionary format.

local dsService = game:GetService("DataStoreService")
local ds = dsService:GetDataStore("Stage")

local playerData = {}

game.Players.PlayerAdded:Connect(function(plr)

	local key = plr.UserId
		
	playerData[plr.Name] = {}
	playerData[plr.Name].Stage = 0

	local getData 
	local succ, err = pcall(function()
		getData = ds:GetAsync(key)
	end)

	if succ then
		if getData then
			print("data successfully loaded")
			playerData[plr.Name] = getData
		else
			playerData[plr.Name].Stage = 0
			print("no save")
		end
	else
		warn(err)
	end
end)

game.Players.PlayerRemoving:Connect(function(plr)
	local key = plr.UserId
	local succ, err = pcall(function()
		ds:SetAsync(key, playerData[plr.Name])
	end)
	if succ then
		print("save successful")
		playerData[plr.Name] = nil
	end
end)