It seems the Tiki Wiki Module installs phpMyAdmin along with Tiki. The install did not ask for a username/password when it was installing phpMyAddmin, but when I try to access this tool (localhost/phpmyadmin) I get a welcome page asking for my username & password, which I don't have, only my mySQL password from the Bitnami stack installation process.
I wondered if maybe I simply forgot to write this username/password combo down, so I uninstalled and reinstalled this Tiki module. This time the Tiki installation program did not ask for a login username/password for Tiki during setup, and my original is no longer accepted by the newly installed Tiki. So, now neither Tiki nor phpMyAdmin are accessible.
What did I do wrong?