heroku-accounts

Or you can choose a fully-automated approach:

$ heroku accounts:add work --auto
Enter your Heroku credentials.
Email: work@example.org
Password: ******
Generating new SSH key
Generating public/private rsa key pair.
Your identification has been saved in ~/.ssh/identity.heroku.work.
Your public key has been saved in ~/.ssh/identity.heroku.work.pub.
Adding entry to ~/.ssh/config
Adding public key to Heroku account: work@example.org

To switch an app to a different account:

# in project root
heroku accounts:set personal

To list accounts:

$ heroku accounts
personal
work

To remove an account:

$ heroku accounts:remove personal
Account removed: personal

Set a machine-wide default account:

$ heroku accounts:default personal

To clone a git repository from Heroku, change 'heroku.com' to the Host of the desired account defined in your .ssh/config:

$ git clone git@heroku.work:repository.git

If you want to switch the account for an app:

$ heroku accounts:set work

This also changes the URL of the git origin heroku to make sure you're using the correct SSH host.

https://github.com/ddollar/heroku-accounts