Re-use creds from prior setup

I’m new and have been testing with the installations. I have decided on the HAOS method but am prompted again with onboarding and creating new cred’s which I want to keep my current one. How can I bypassed being forced into creating new creds and using my existing?

Can you not just onboard the new user filling out the old credentials? Just re-use User 1 Password XXX?

I was able to re-enter the same info and get past the onboarding. Usually there are databases that refuse the re-entering of the same cred info.
Thanks