How do I use the Airbrake heroku addon

Please review the Airbrake addon docs on heroku

If you have problems after upgrading, please check that you don’t still have Hoptoad installed. You can do this by running:

heroku config -a <app-name> | grep -E "(AIRBRAKE_API_KEY|HOPTOAD_API_KEY)"
heroku config:remove HOPTOAD_API_KEY --app <app-name>