GUI Purchase Handler (Gamepass)

--[[
 || 📜 AUTHOR: @4zx16 || GAMEPASS GUI PURCHASE HANDLER || SELL GUIs USING GAMEPASSES.
]]
local MPS = game:GetService("MarketplaceService")
local plr = game:GetService("Players").LocalPlayer
local event = game:GetService("ReplicatedStorage").GUI
local id = 0

local function HandlePurchase()
    if MPS:UserOwnsGamePassAsync(plr.UserId, id) then
        wait(1)
        event:FireServer()
    else
        MPS:PromptGamePassPurchase(plr, id)
    end
end
script.Parent.MouseButton1Click:Connect(HandlePurchase)