Why can't I store "money" in the DataStoreService?

I have recently been making a game where I need to store the player's money, that when the player is going to join next time he or she would have the same value of money as the last time the player played. I have tried hard to make it work but I can't solve the problem. Can you help me? I will remember to accept a fulfilling answer

--Variables--
trashClick = 0
trashValue = 0
local TrashPart = game.Workspace.TrashPart
local DataStoreService = game:GetService("DataStoreService")
local MoneyStore = DataStoreService:GetDataStore("MoneyStore")
local Data

game.Players.PlayerAdded:connect(function(player) -- This funcion starts to run when a player joins the game --

-- The leader board is about to be created--
     local StartingMoney = (0)
     local leaderstats = Instance.new("Folder")
     leaderstats.Name = "leaderstats"
     leaderstats.Parent = player

     local money = Instance.new("NumberValue")
     money.Name = "Money"
     money.Parent = leaderstats
     money.Value = StartingMoney

    game.Workspace.TrashPart.ClickDetector.MouseClick:Connect(function() -- When a player clicks on a trash the funcion starts to run --
        trashValue = trashValue + 1
        trashClick = trashClick +1
        if trashClick == 10 then
            TrashPart:Destroy()
        end
        print(trashValue)
    end)

    game.Workspace.DumpingPart.Touched:Connect(function(player1) -- When a player touches the dumpster ground the function starts to tun --
        if player1.Parent:FindFirstChild("Humanoid") then
            money.Value = money.Value + trashValue
            trashValue = 0
        end
    end)

    -- Data store gets data from the player--
    local sucess, errormessage = pcall(function()
        Data = MoneyStore:SetAsync(player.UserId.."-money")
    end)
    if sucess then
        money.Value = Data
    else
        print("error")
        warn(errormessage)
    end

end)

game.Players.PlayerRemoving:Connect(function(player)-- When a player quits the game the function starts to run --

-- Datastore saves the data --
    local sucess, errormessage = pcall(function()
        MoneyStore:SetAsync(player.UserId.."-money",player.leaderstats.money.Value)
    end)

    if success then
        print("data sotred")
    else
        print("error")
        warn(errormessage)
    end

end)