It is impossible to prove something does not exist.
Non-existant things are non-existant which means there are no things that do not exists.
That means you cannot prove the non-existance of something.

Saying ‘prove that god does not exist’ is like saying ‘prove to me I am not thinking of your mum being nude’.
Impossible.

Also: The burden of proof is on your side as you are the one claiming it to exist.
As long as you do not prove the existance of the allmighty master I am going to assume he is non-existant.