If you enter the wrong password when prompted, you'll get a mysterious "Resource not found" error. Should probably just tell you that your password was invalid. Seems small, but I chased my tail for a little while uninstalling plugins and asking around in the API hipchat room before realizing this.
Enter your Heroku credentials.
Email: jroes@heroku.com
Password (typing will be hidden):
Two-factor code: xxxxxx
! Resource not found
If you enter the wrong password when prompted, you'll get a mysterious "Resource not found" error. Should probably just tell you that your password was invalid. Seems small, but I chased my tail for a little while uninstalling plugins and asking around in the API hipchat room before realizing this.