Hey guys, it isnt saving anything. can anyone help me?

local ds = game:GetService("DataStoreService")
local cs = ds:GetDataStore("Cash")

game.Players.PlayerAdded:Connect(function(plr)
    local Cash = plr:WaitForChild("leaderstats"):WaitForChild("Cash")

    local data
    local succ, err = pcall(function()
        data = cs:GetAsync(plr.UserId.."_cash", Cash)

        if succ then
            Cash = data
            print("a")
        end
    end)
end)

game.Players.PlayerRemoving:Connect(function(plr)
    local data = plr.leaderstats.Cash.Value

    local succ, err = pcall(function()
        cs:SetAsync(plr.UserId.."_cash", data)

        if succ then
            print("it worked")
        else
            warn(err)
        end
    end)
end)

please help! it says

nil

when i leave which means nothing or there was an error