THANK YOU
This is what I was talking about the whole time.
YOUR OLD PASSWORD WORKS!!!
Just log in. Please, I cannot take this anymore. End my suffering.
If that were true, then anyone who successfully logged into Thunderbird using your compromised password could still fiddle around with your account, even though you purposefully changed the password to stop that. Everyone would need to disable the OAUTH token manually, which only experienced users know about. Therefore it only makes sense to assume that the OAUTH token gets revoked/invalid once a password change occured. Actually, Google is even much more paranoid than that. I wonder why you didn’t get a timeout anyway, when you were attempting to get into your mail so many times, unsuccessfully. If I did that to my account, they would’ve blocked me out for good, a long time ago…
I just researched my claims, here are the results:
The first part of what you are saying is true:
I am also right about the second part, as it is obvious:
(This btw. also proves that I was right all along. Your “old password” IS YOUR CURRENT PASSWORD. There is no way it does not work. Therefore, there was human error involved the whole time, as I was preaching the entire conversation long. Well, I reached my slavation of this thread. Discussion closed. If this was a Github issue, I would close it right now, but I can’t here because people wouldn’t be able to continue talking here. So I’ll just symbolically close this thread.)