Everytime you press the button in prompts the gamepass purchase, how to fix?

I just want the button (textbutton) to check if you own the gamepass, if you do it gives you the perks, if you dont only then it prompts to purchase the gamepass. I tried fixing it on my own and know it must not be that hard but it didnt work.

local player = script.Parent.Parent.Parent.Parent
local button = script.Parent
local MarketServicePlace = game:GetService("MarketplaceService")
local id = 18020349

script.Parent.MouseButton1Click:Connect(function()
	game:GetService("MarketplaceService"):PromptGamePassPurchase(player, id)

	game:GetService("MarketplaceService").PromptGamePassPurchaseFinished:Connect(function(plr,ido,purchased)
		if game:GetService("MarketplaceService"):UserOwnsGamePassAsync(player.UserId,id) == true then
			player.Character.Humanoid.HeadScale.Value = 0.35
			player.Character.Humanoid.BodyDepthScale.Value = 0.35
			player.Character.Humanoid.BodyWidthScale.Value = 0.35
			player.Character.Humanoid.BodyHeightScale.Value = 0.35
			player.Character.Humanoid.WalkSpeed = 30
			player.Character.Humanoid.JumpPower = 500
			
		end
	end)
end)

To check if someone has the gamepass, you do the following

local MarketPlaceService = game:GetService("MarketPlaceService ")

local PlayerBoughtThisGamePass =  MarketPlaceService.UserOwnsGamePassAsync(Userid, GamePassiD)

if PlayerBoughtThisGamePass then
  print("Player Has Bought This GamePass")

else 

--prompt the game pass, idk how to do that
end