Assazm

> Do you run the `bin/setup_heroku` in a terminal？ If not, you can login Heroku website, go to your huginn app "setting", click "reveal config vars" and see the "INVITATION_CODE"....

same issue on 0.4.28. here is the sample data  https://mp.weixin.qq.com/s/eAP2_TUyoF9uVjUb6cUWYw