List Samba users?

Problem

So yesterday evening I was pulling my hair out (figuratively -- I'm bald) for over an hour trying to figure out why kept rejecting my attempts to reset the password for one of my Samba users. Anyway, long story short, it was apparently because the user didn't exist yet ( added her without complaint, and now everything's hunky-dory), even though I still swear up and down that I did indeed add her already. Anyway, if I could have simply listed the users in the smbpasswd database, it would saved me a lot of grief. Is there a command or utility that can do that? (Samba's using that new-fangled .tdb database, otherwise I would have just .)