Apple TV won't accept password.
I got the most recent Apple TV 4K. Moved the old one to a TV in the basement. It worked fine for several weeks. Today it asks for my iCloud password. I enter it, the same password that allowed me to sign in to this forum, and it rejects it. The WiFi is working fine as I can eventually get beyond that login screen and the streaming apps work just fine. Have tried the usual first steps of power cycle. What should I try next? But now that I've had several failed login attempts, it may force me to reset my iCloud password and it is used lots of places so that would be painful. Advice?
There was an old thread about this in 2016 but it didn't help.