Making this Developer Product give a tool upon purchase

Hello! To check out the new developer product feature, I decided to make this SurfaceGUI in my place where you can buy a product for 10 tickets, and it gives you a tool from Lightning. At first I tried making it using a normal GUI, but I gave up seeing I couldn't figure it out.

I got closer to reaching my goal when using the SurfaceGUI, though. Almost everything is ready; you can click the SurfaceGUI, and it'll show you the message to confirm the purchase. However, I can't make it give you the tool upon purchase, even though I know exactly where I have to edit the script. Code below:

-- setup local variables
local MarketplaceService = Game:GetService("MarketplaceService")
local ds = game:GetService("DataStoreService"):GetDataStore("PurchaseHistory")
local productId = "19182249"

-- define function that will be called when purchase finished
MarketplaceService.ProcessReceipt = function(receiptInfo) 

	-- find the player based on the PlayerId in receiptInfo
	for i, player in ipairs(game.Players:GetChildren()) do
		if player.userId == receiptInfo.PlayerId then
			
			-- check which product was purchased
			if receiptInfo.ProductId == productId then
				
				-- the part below is the where the tool giving line should be, instead of healing the player
				player.Character.Humanoid.Health = 100
				-- more feedback for the player.
				game.Workspace.DisplayScreen.SurfaceGui.TextBox.Text = player.Name .. " has purchased a healing potion."
			end
		end
	end	
	
	-- record the transaction in a Data Store
	local playerProductKey = "player_" .. receiptInfo.PlayerId .. "_purchase_" .. receiptInfo.PurchaseId
	ds:IncrementAsync(playerProductKey, 1)	
	
	-- tell ROBLOX that we have successfully handled the transaction
	return Enum.ProductPurchaseDecision.PurchaseGranted		
end

Right now, what the purchase does is set your health to 100. The tool I want to be given is called GoldenAWP. Could anyone help me? Thanks!

Please keep in mind I can't script at all.

Try changing the walkspeed code to

game.Lighting["Weapon"]:clone().Parent = player.BackPack

If you change it to:

game.Lighting["Weapon"]:clone().Parent = player.BackPack

Then you have to actually put the tool in Lighting.

I think you have to put the tool in ReplicatedStorage.