CAN YOU change account setting after docker setup?

I setup docker using the instruction and everything working nicely. Figured out most things. But I used default username/password now already created docker with these credentials. Is there a way to chance the username and password once I am long this way. I can re-setup by modifying the docker-compose.yml file and re-create docker images but it is already going to be time-consuming.

ok, i see from web portal, i can change password but not email. Hoping that I Can change e-mail or even add…