item saving system with data store doesnt work?

ok i tried my best. so im making an upgraded version of a regular tycoon. heres a script that is supposed to save all things player has purchased into a table, save the table and when he join put items from the table into purchased things. (it doesnt work of course for some reasons, im not getting any errors)

local datastore = game:GetService("DataStoreService")
local ds2 = datastore:GetDataStore("DS2")
local purchasables = game.ServerStorage.PURCHASABLES:GetChildren()
game.Players.PlayerAdded:Connect(function(plr)
    local success,err = pcall(function()
		for i,v in pairs(purchasables) do
			if v.Name == val then
				v.Parent = game.Workspace.PURCHASED
			end
		end
    end)
    if success then
        print("Your Items Have Been Loaded.")
    else
        print("Your Items Loading Has Failed.")
        warn(err)
    end
end)

game.Players.PlayerRemoving:Connect(function(plr)
	for i,v in pairs(game.Workspace.PURCHASED:GetChildren()) do
		tab,val = {},v.Name
		table.insert(tab,val)
	end
    local success,err = pcall(function()
		for i,v in pairs(purchasables) do
			ds2:SetAsync(plr.UserId,val)
        end
    end)
    if success then
        print("Your Items Have Been Saved.")
    else
        print("We Got An Error While Saving Your Items.")
        warn(err)
    end
end)