Cannot login as "Noname" after installing Macosx Big Sur
I stopped using a 2016 macbook pro and was going to sell it. I wiped it of data and reinstalled Big Sur. Unfortunately, I left the laptop to sit for several months and I think the battery went flat. Now when I try to start it up, it wants me to log in as "Noname" and I don't know what the password is. I have no data I want to keep, but can't work out how to login or create a new admin account. I've tried all sorts of restart sequences, but it always wants me to log in as "Noname".
MacBook Pro 15″, macOS 11.1