I did attempt a search of my problem, but gave up when I received no response after about 20 seconds.
Probably my search words were incorrect.
"This is a newbie-do, so to speak. command line is recommended"
I know I need to learn how to use this web site. I don't know how to use the search 'command line'
I will spend time at https://help.ubuntu.com/community
That 'password' article did not enable me to understand how to correct whatever is causing "authentication manipulation error" was, nor
explain what "login keyring" is. Whatever that is, keeps appearing and interferes with software manager updates and any other application I attempt.
Maybe I need to uninstall Ubuntu and reinstall.