Installation issues reset log in and pw

Hi all,
I got the HA Yellow on the kick starter program (2023) (which took about a year to arrive due to shortages) when it arrived i went through the install steps that were laid out…no luck kept getting connection fails. 2 years later I got so close…I finally got a user name and login screen but there is no way of setting the name or pw? how can i reset this and start fresh ?

read the docs. especially the troubleshooting bit