My Cash saving script ist working. Console just says "Cash isnt a valid member of folder"?

I wanted to make a Cash saving script. It says Cash is not a valid member of folder. (Note: Im not that good in englisch, so please dont use super complicated words, thanks)

local DataStore = game:GetService("DataStoreService")
local ds = DataStore:GetDataStore("CashSaveSystem")

game.Players.PlayerAdded:connect(function(player)
    local leader = Instance.new("Folder",player)
    leader.Name = "leaderstats"
    local Cash = Instance.new("IntValue",leader)
    Cash.Name = "Coins"
    Cash.Value = ds:GetAsync(player.UserId) or 0
    ds:SetAsync(player.UserId, Cash.Value)
    Cash.Changed:connect(function()
        ds:SetAsync(player.UserId, Cash.Value)
    end)
end)


game.Players.PlayerRemoving:connect(function(player)
    ds:SetAsync(player.UserId, player.leaderstats.Cash.Value)
end)