The datastore wont change it's value to the leaderstats value, why?

I was using a bunch of different datastore scripts, none of them worked and I was stumped, I decided to use the Alvinblox one and it didn't work, I went into the console and saw that the datastore was set to the right value, but it wasn't changing the leaderstats to that value.

local DataStoreService = game:GetService("DataStoreService")

local myDataStore = DataStoreService:GetDataStore("myDataStore")

game.Players.PlayerAdded:Connect(function(player)
    local leaderstats = Instance.new("Folder")
    leaderstats.Name = "leaderstats"
    leaderstats.Parent = player

    local cash = Instance.new("IntValue")
    cash.Name = "Dollaroos"
    cash.Parent = leaderstats

    local data
    local success, errormessage = pcall(function()
        data = myDataStore:GetAsync(player.UserId.."-cash")
    end)

    if success then
        cash.Value = data
    else
        print("There was an issue saving your data")
        warn(errormessage)
    end
end)

game.Players.PlayerRemoving:Connect(function(player)

    local success, errormessage = pcall(function()
        myDataStore:SetAsync(player.UserId.."-cash",player.leaderstats.Dollaroos.Value)
    end)

    if success then
        print("Player Data Successfully Saved!")
    else 
        print("There was an error when saving data")
        warn(errormessage)
    end

end)

all I did was modify his script because I didn't want to break it.