Why are my customers not getting their Player Points?

I have this script, in a normal script, since PP work in normal scripts only. But I am not getting my points, what's wrong with my script?

local buyButton = game.Workspace.Buttons.BuyButton.SurfaceGui.TextButton
buyButton.MouseButton1Click:connect(function(LocalPlayer)
	local user = LocalPlayer.userId
	local productId = 19251902
	Game:GetService("MarketplaceService"):PromptProductPurchase(LocalPlayer, productId)
	local PointsService = Game:GetService("PointsService")
	local pointsToAward = PointsService:GetAwardablePoints()
	game.Players.LocalPlayer.leaderstats.Diamonds.Value = LocalPlayer.leaderstats.Diamonds.Value + 10
	if ( pointsToAward > 0) then
		PointsService:AwardPoints(player.userId, 1)
	end
end)