Unusual problem for me... I installed it on a MAMP instance and I don't seem to be able to do an initial authentication. At first I thought just didn't remember

Unusual problem for me... I installed it on a MAMP instance and I don't seem to be able to do an initial authentication. At first I thought just didn't remember my username/password correctly. So I dropped my tables and started again. But the same thing happened. I stepped back a few screens and noted what I thought to be just weird typo... but it showed: Your Account Credentials You can login to the control panel, and throughout the site, with: Username: or Password: This is unmodified output from the page. It looks like the username and password should be present here. It was not. So maybe something usual with my installation of MAMP that could be creating this side effect. The user record definitely exists. I don't see errors in the server logs. Want to help me figure out where I went wrong?