My data store does not save data. Is there something wrong that I did?

Here is the code:

local dataStore = game:GetService("DataStoreService")

local levelData = dataStore:GetDataStore("LevelSaveSystem")
local xpData = dataStore:GetDataStore("XPSaveSystem")
local goldData = dataStore:GetDataStore("GoldSaveSystem")

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

    local leaderstats = Instance.new("Folder", player)
    leaderstats.Name = "leaderstats"

    local level = Instance.new("IntValue", leaderstats)
    level.Name = "Level"

    local XP = Instance.new("IntValue", leaderstats)
    XP.Name = "XP"

    local gold = Instance.new("IntValue", leaderstats)
    gold.Name = "Gold"

    local userLevel
    local userXP
    local userGold
    local success, err = pcall(function()
        userLevel = levelData:GetAsync(player.UserId) or 1
        userXP = xpData:GetAsync(player.UserId)
        userGold = goldData:GetAsync(player.UserId)
    end)
    if success then
        if userLevel and userXP and userGold then
            wait()
            level.Value = userLevel
            XP.Value = userXP
            gold.Value = userGold
        end
    elseif err then
        player:Kick("Save Data not loaded, please try rejoining.")
    end
    print(err)

    game.Players.PlayerRemoving:connect(function(player)
        local currentLevel = level.Value
        local currentXP = XP.Value
        local currentGold = gold.Value
        local success, err = pcall(function()
            levelData:SetAsync(player.UserId, currentLevel)
            xpData:SetAsync(player.UserId, currentXP)
            goldData:SetAsync(player.UserId, currentGold)
        end)
        if success then
            print("Data Successfully Saved for user "..player.UserId)
        end
        if err then
            print("There was an error in saving data!")
            warn(err)
        end
    end)
end)