Get the creator of a token

I'm monitoring some pump tokens and I want to know who originally created the token, now , I've seen the following answer:

I need to get the creator of an SPL token that has been minted already

problem is, every pump token has the same updateAutority:TSLvdd1pWpHVjahSpsvCXUbgwsL3JAcvokwaKt1eokM

so it's not the creator of the token. Again, the creators field for all the pump tokens is null, so, any suggestions?

Thanks