Leaderboard datastore not saving error?

Hello! I'm making a model with the robbable bank of alvinblox because many people want it with a script that makes de money save so I'm trying to do it, but as soon as I tested got this error: getasync is not a valid member of datastoreservice. And of course, the leaderboard doesn't show. If someone can fix it, there's the script:

local ds = game:GetService("DataStoreService")
game.Players.PlayerAdded:Connect(function(player)
    local data = ds:GetAsync("player_" .. player.UserId) or 0
    local ls = Instance.new("Folder",player)
    ls.Name = "leaderstats"
    local money = Instance.new("IntValue",ls)
    money.Name = "Money"
    money.Value = data
    local cc = Instance.new("IntValue",player)
    cc.Name = "CashCollected"
    local robbing = Instance.new("BoolValue",player)
    robbing.Name = "Robbing"
    robbing.Value = false
    player.CharacterAdded:Connect(function(char)
        player.Robbing.Value = false
        player.CashCollected.Value = 0
    end)
end)
game.Players.PlayerRemoving:Connect(function(player)
    ds:SetAsync("player_" .. player.UserId, player:WaitForChild("leaderstats").Money.Value)
end)