Purpose of God: Exploring His Role in the Universe

I have a question for God. God, if you were what gives humanity purpose, then what is your purpose? Did you have any sort of purpose before we existed? Do you have any sort of purpose predating the universe? What was your purpose? Was it just to create humans and judge them? I mean, there is a multitude of prophets and gurus claiming to speak for you and tell people what you want them to do, but the fact of the matter is we have no idea why you exist or why we should care that you exist. And we have no idea what exact purpose you are supposed to serve. The question I have for you God is why do you exist?