It was your mama!
If god made the universe and earth and everything on it what made god?
The perennial existential question.
I say the evidence shows the universe is it’s own result and primitive men invented God to explain what they couldn’t.
Aristotle reasoned to the existence of an "uncaused cause"---one that had not been created, but rather had always existed.
A God that has always existed, but never was caused would fit that definition.
(Food for thought...)
God made himself probably.