I originally set up my Raspberry Pi to start up without requiring a login username and password, but some friends (still friends in spite of it all) did something so that it now requires a login. Unfortunately I did not make a note of whatever the username and password were, and trying all the obvious ones doesn't work. I have read of safe mode, and now have a command line after shorting pins 5 and 6. What I need to know now is to find out what usernames are available, or stored, and then I can set a password. Please can someone tell me how?
Alternatively, is there a way, at this safe mode command line, to set it back to the state where no login is needed?