How do I thank players via GUI after they bought a developer product? NOT SOLVED

Okay, so I made a donation UI, but after they buy the product, how do I thank players via a GUI after they bought the developer product?

If you know how, please tell me. I am using this script to make the purchase prompt pop up on click.

local productId = 1231980771
local player = game.Players.LocalPlayer

script.Parent.MouseButton1Click:connect(function() 
	Game:GetService("MarketplaceService"):PromptProductPurchase(player, productId)
end)

This should help: [I dont do dev products that much, so idk if it will work. Pls say if it does not]

local productID = 1231980771
local MarketplaceService = game:GetService("MarketplaceService")
local productInfo = MarketplaceService:GetProductInfo(productID, Enum.InfoType.Product)
local function processReceipt(receiptInfo)
 -- Enable gui here
end

MarketPlaceService.ProcessReceipt = procesReceipt

Here are some helpfull links I have found: link 1 link 2 link 3

https://developer.roblox.com/en-us/articles/Developer-Products-In-Game-Purchases This might help ya