I've registered with Octoprint.
At octopi.local I attempt Login ...
My Octoprint user name and password do not allow me to Login.
My Octopi user name and password do not allow me to Login
What to do?
Are you trying to remote into the Raspberry Pi at a command prompt?
ssh pi@octopi.local
# ...using "raspberry" as the default password
Or are you trying to log into the web interface via http://octopi.local? If so, then you'd need the user and password that you entered during the initial Setup Wizard when it asked you for that information, assuming that you clicked the blue button. If you clicked the red button during the wizard, then there is no access control on the web interface.
Got it! Thanks for help.