It eventually worked. I had already used that username and another possibility with three possible passwords that I could think of over and over. Finally it took.
This may indicate that the definition of sanity is to expect different results while doing the same thing over and over.
That it did not work many times and that a reset password was never sent no matter how many times it was requested may be a problem for some, I suppose. But now it’s not a problem for me.
Thank you for your suggestions, time, and willingness to help.