Why does my data not save???

local Players = game:GetService("Players")
local DatastoreService = game:GetService("DataStoreService")

local database = DatastoreService:GetDataStore("data")
local sessionData = {}

function PlayerAdded(player)
	local Data = Instance.new("Folder")
	Data.Name = "Data"

	local Levels = Instance.new("IntValue")
	Levels.Name = "Levels"
	Levels.Parent = Data


	local success = nil
	local playerData = nil
	local attempt = 1

	repeat
		success, playerData = pcall(function()
			return database:GetAsync(player.UserId)
		end)

		attempt += 1
		if not success then
			warn(playerData)
			task.wait(3)
		end
	until success or attempt == 5

	if success then
		print("Connected")
		if not playerData then
			print("Assigning Default")
			playerData = {
				["Levels"] = 1
			}
		end
		sessionData[player.UserId] = playerData
	else
		warn("Cant Get Data")
		player:Kick("Cannot Load Data")
	end

	Levels.Value = sessionData[player.UserId].Levels
	Levels.Changed:Connect(function()
		sessionData[player.UserId].Levels = Levels.Value
	end)

	Data.Parent = player
end

Players.PlayerAdded:Connect(PlayerAdded)


function PlayerLeaving(player)
	if sessionData[player.UserId] then
		local success = nil
		local errorMsg = nil
		local attempt = 1

		repeat
			success, errorMsg = pcall(function()
				database:SetAsync(player.UserId, sessionData[player.UserId])
			end)

			attempt += 1
			if not success then
				warn(errorMsg)
				task.wait(3)
			end
		until success or attempt == 5

		if success then
			print("Data Saved")
		else
			warn("Data Did Not Save")
		end

	end
end

Players.PlayerRemoving:Connect(PlayerLeaving)