What is the password for ubuntu user?

1. I am using Oracle Virtual Box v7.1.4 r165100.
2. I downloaded "ubuntu-24.04.1-desktop-amd64" image.
3. I created a username and password as part of the image setup.
4. There was an error towards the end of the image deployement, but Ubuntu still managed to start.
5. When I start terminal I can only see Ubuntu users (please see screenshot). i cannot see the username I created.
6. That's fine. I can still create my own user, but I am worrieed if I logout then I won't be able to login: what is the password for user "ubuntu" please?

Please note: I tried blank, "reverse", "ubuntu", "admin". None worked.