I encountered a problem with Heroku when I started using multiple accounts on the same machine.
This is when this accounts plugin helps.
When I tried to push to my repos, I got the following error:
! Your account [email protected] does not have access to myapp. ! ! SSH Key Fingerprint: xx:xx:xx
heroku login with the account didn’t help to ‘logout the previous’. The accounts plugin solved the problem.
The plugin is also useful as it helps to set up ssh fingerprint in 1 command!