Default username/password for Debian image

When attempting to log into the Debian Desktop image with the username and password ‘rock’ via UART, I get this:

localhost.localdomain login: rock

Login incorrect
localhost.localdomain login:

Is the default username/password for this image different from the Ubuntu Server one? That username and password worked fine there.

If you got image from then its root / 1234

I got the image from, the Debian Buster section.

it should be rock/rock, but for some images there was radxa/radxa or root/root or someething with one of those names but no password.
Also pay extra attention if You connection settings are correct