what is the problem with this dataStore script?

I am trying to use a dataStore to save the player's cash but from some reason it does not work, does anyone see what the problem is? (the cash value is stored in an IntValue called "Cash" in leaderstats)

local DataStoreService = game:GetService("DataStoreService")
local cashStore = DataStoreService:GetDataStore("PlayerCash")
local Players = game:GetService("Players")
local AUTOSAVE_INTERVAL = 15
local function saveData(dataStoreKey, value)
    local setSuccess, errorMessage = pcall(function()
        cashStore:SetAsync(dataStoreKey, value)
    end)
    if not setSuccess then
        warn(errorMessage)
    end
end

local function onPlayerRemoving(player)
    local playerUserID = player.UserId
    local playerCash = player.leaderstats.Cash
    if playerCash.Value then
        saveData(playerUserID, playerCash.Value)
        print("cash saved")
    end
end

local function onPlayerAdded(player)
    local playerUserID = player.UserId
    local playerCash = player:WaitForChild("leaderstats"):WaitForChild("Cash")
    local success, storedCash = pcall(function()
        return cashStore:GetAsync(playerUserID)
    end)
    if success then
        local currentCash = storedCash or 100
        playerCash.Value = currentCash
    end

    coroutine.wrap(function()
        while wait(AUTOSAVE_INTERVAL) do
            if playerCash.Value then
                saveData(playerUserID, playerCash.Value)
                print("cash saved")
            end
        end
    end)()
end

Players.PlayerAdded:Connect(onPlayerAdded)
Players.PlayerRemoving:Connect(onPlayerRemoving)