It all depends how its been coded. It may be linked to a panel in which case its 99.99% impossible. If you know the server, you can decompile the apk and look for it. If you don't, you might be able to identify it by using something like NetCapture.
not being rude here but if you bought it why didnt you specify you wanted to use a couple of portals (services) ?
speak to who you bought it off if he is a decent lad he will sort it out for you.