Same story for me. Tried method 1 and 2 and neither worked for me.
- Made sure that I removed the Hubitat Elevation from ecobee My Apps page.
- Logged out of ecobee.
- HE ecobee app - prompted to Authorize App. Logging on with my known good credentials failed.
- Clicked on If you have forgotten your password, then please click here.
- Got auth.ecobee.com message Check Your Email for instructions to reset your password.
- Opened new ecobee email and clicked on secure password reset link.
- Entered my same password for the ecobee Change Your Password New Password and Re-enter new password boxes.
- ecobee goes to it's Home page.
- HE ecobee app tried logging on again.
- New ecobee message to Decline or Accept to Authorize Hubitat Elevation. I clicked Accept.
- Authorized App with the reset password credentials which was the same as before. Got message the user name or password you provided was incorrect.
- Went to Google Chrome new page and logged onto ecobee. From ecobee My Apps, I can see that Hubitat Elevation was re-added as one of my apps. I had removed the HE app from ecobee on step 1 so it was added back in I'm guessing in step 10 when prompted to authorize HE and I clicked Accept.
- Logged out of ecobee from Google Chrome page, closed out all browsers and shutdown PC.
- Restarted PC
- HE ecobee app - prompted to Authorize App again. Logging on with my known good credentials failed.
- Back to same as before step 4. Clicked on If you have forgotten your password, then please click here.
- Repeated steps 5-9 with same outcome.
- HE ecobee app - prompted to Authorize App again. Logging on with my known good credentials failed.
At that point, I gave up. I guess at some time I'll have to contact ecobee tech support and see if I have some success.