Why my data store is not working is there any problem of this code?

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1 
local dataStoreService = game:GetService("DataStoreService")
local StageStore = dataStoreService:GetDataStore("PlayersDataStore")

function PlrToStage(plr)
	repeat wait() until plr.Character.HumanoidRootPart
	
	local stagePart = game.Workspace.Checkpoints:FindFirstChild(tostring(plr.leaderstats.Stage.Value))
	
	plr.Character.HumanoidRootPart.CFrame = stagePart.CFrame + Vector3.new(0,2.5,0)
end

game.Players.PlayerAdded:Connect(function(player)
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	leaderstats.Parent = player
	
	local stage = Instance.new("IntValue")
	stage.Name = "Stage"
	stage.Parent = leaderstats
	
	local sucess, errormessage = pcall(function()
		stage.Value = StageStore:GetAsync(player.UserId)
	end)
	
	if sucess then
		print("Sucessfully Got"..player.Name"'Stage Data.")
	else
		warn(errormessage)
	end

if player.Character then
	PlrToStage(player)
end

player.CharacterAdded:Connect(function()
	PlrToStage(player)
	end)
end)


game.Players.PlayerRemoving:Connect(function(player)
	local sucess, errormessage = pcall(function()
		StageStore:SetAsync(player.UserId,player.leaderstats.Stage.Value)
	end)
	
	if sucess then
		print("Sucessfully Saved"..player.Name"Stage Data.")
	else
		warn(errormessage)
	end
end)

for _, checkpoint in pairs (game.Workspace.Checkpoints:GetChildren()) do
	checkpoint.Touched:Connect(function(hit)
		if hit.Parent:FIndFirstChild("Humanoid") then
			local player = game.Players:GetPlayerFromCharacter(hit.Parent)
			
			local checkpointNumber = tonumber(checkpoint.Name)
			
			if player.leaderstats.Stage.Value < checkpointNumber then
				player.leaderstats.Stage.Value = checkpointNumber
			end
		end
	end)
end
2

check if you have API services enabled