Adding Creator Tags To Roblox Weapon Kit?

Roblox has the best guns for my purposes, only problem is that in their guns, there is no creator tag used, and because I'm quite new to scripting, I don't know how to add one in. rbxassetid://4842207161

this is one of the guns that im using, and i want to make a leaderboard, and i want to use creator tag for that.

this is leaderstat script im using

game.Players.PlayerAdded:Connect(function(player)
	local LS = Instance.new("Folder")
	LS.Name = "leaderstats"
	LS.Parent = player
	
	local kills = Instance.new("NumberValue")
	kills.Name = "Kills"
	kills.Parent = LS
	kills.Value = 0
	
	local cash = Instance.new("NumberValue")
	cash.Parent = LS
	cash.Value = 0
	cash.Name = "Cash"
	
	player.CharacterAdded:connect(function(character)
		character.Humanoid.Died:connect(function()
			local creator = character.Humanoid:FindFirstChild('creator')
				local leaderstats = creator.Value:FindFirstChild('leaderstats')
				
				if creator ~= nil and creator.Value ~= nil then
					local cashAmount = 10
					local killAmount = 1
				
					game.ReplicatedStorage.RemoteEvents.VALUEEvent:FireClient(player)
					leaderstats.Cash.Value = leaderstats.Cash.value + cashAmount
					leaderstats.Kills.Value = leaderstats.Kills.value + killAmount
					game.ReplicatedStorage.Values.KillsCounter = game.ReplicatedStorage.Values.KillCounter + 1
				end
			end)
		end)
	end)