Saving other values than leaderstats?

Should I be able to save values other than leaderstats? I have a boolean directly inside the player in Players. I also have leaderstats. My leaderstats save correctly, however my boolean doesn't save. I am using the same method on both, and it never gives off any errors. (I am using GetAsync and SetAsync)

local datastore = game:GetService("DataStoreService")
local ds = datastore:GetDataStore("item")

game.Players.PlayerAdded:Connect(function(plr)

    local item = Instance.new("BoolValue",plr)
    item.Name = "Sparkles"

    local d1

    local y1 = pcall(function()
        d1 = ds:GetAsync(plr.UserId.."Sparkles-")
    end)

    if  y1 then
        item.Value = d1
    end


    local y1 = pcall(function()
        ds:SetAsync(plr.UserId.."Sparkles-",plr.Sparkles.Value)
    end)
end)