How Would I Make It So When Someone Buys A Gampass They Get A Item In-Game?

Is there a way to make it so then someone buys a gamepass and it gives them a item in-game i try all of them but they never work.

Put this script's code in a script in StarterPack.

wait(5)

local GamePassService = game:GetService("GamePassService")
local MarketplaceService = game:GetService("MarketplaceService")

local ServerStorage = game.ServerStorage
local GamePassTools = ServerStorage.GamePassTools
local ItemList = {}

local player = script.Parent.Parent

-- Give the tool to this player.
function GiveTool(toolItem)
	local backpackToolItem = toolItem:Clone()
	backpackToolItem.Parent = player.Backpack
	
	local starterGearToolItem = toolItem:Clone()
	starterGearToolItem.Parent = player.StarterGear
end

-- Checks if the player has the game pass, and if so then give the tool to the player.
-- Otherwise, give the tool to the player after the player gets the game pass.
function CheckForGamePassForTool(toolItem)
	local RequiredGamePassID = toolItem:FindFirstChild("RequiredGamePassID").Value
	local AlreadyHasGamePass = false --player.Name == "MatthewCenance"
	
	local success, message = pcall(function()
		AlreadyHasGamePass = MarketplaceService:UserOwnsGamePassAsync(player.UserId, RequiredGamePassID)
	end)
	
	if not success then
		warn("Error: " .. message)
	end
	
	if AlreadyHasGamePass then
		GiveTool(toolItem)
	else
		MarketplaceService.PromptGamePassPurchaseFinished:Connect(function(player2, gamePassID, purchased)
			if player2 == player and gamePassID == RequiredGamePassID then
				if purchased then
					AlreadyHasGamePass = true
					GiveTool(toolItem)
				end
			end
		end)
	end
end

for key, toolItem in ipairs(GamePassTools:GetChildren()) do
	spawn(function()
		CheckForGamePassForTool(toolItem)
	end)
end

Then, create a folder titled "GamePassTools" in ServerStorage.

Finally put items in the new folder and for each item in the GamePassTools folder, put in an IntValue named "RequiredGamePassID" with the value of the Game Pass id set as the value of the object.