Why is this Developer Product script not working?

This script is supposed to detect when a player bought a Developer Product in the game, and give them points for doing so.

However, the script is not working, and I have no idea why, as output gave me nothing.

Can someone please help me?

Here's the script:

DataStore = game:GetService("DataStoreService"):GetDataStore("PurchaseHistory")



game:GetService("MarketplaceService").ProcessReceipt = function(infoo)
    local playerDPkey = infoo.PlayerId..":"..infoo.PurchaseId
    if DataStore:GetAsync(playerDPkey) then
    else
        print(playerDPkey)
        for i,v in pairs(game.Players:GetChildren()) do
            if v.userId == infoo.PlayerId then

                if infoo.ProductId == 29787465 then
                    local lds = v:FindFirstChild("leaderstats")
                    if lds ~= nil then
                        local cs = lds:FindFirstChild("Points")
                        if cs ~= nil then
                            cs.Value = cs.Value + 1000
                        end
                    end
                end

            end
        end
        DataStore:SetAsync(playerDPkey, true)
    end
    return Enum.ProductPurchaseDecision.PurchaseGranted
end