Access forbidden to Heroku app that I just created [ Error: You do not have access to the app my-app. » Error ID: forbidden]

So I was following a tutorial on how to use Heroku. Smooth sailing until I created the app and immediately got my access denied. I followed the steps provided here: https://medium.com/@qazi/how-to-deploy-a-django-app-to-heroku-in-2018-the-easy-way-48a528d97f9c.

Immediately after using this command access was denied :

heroku addons:create heroku-postgresql:hobby-dev --app my-app
Creating heroku-postgresql:hobby-dev on ⬢ my-app... !
 !    You do not have access to the app my-app.

I tried to migrate anyway hoping access might be restored and this was the result :

    heroku run python manage.py migrate -a my-app
Running python manage.py migrate on ⬢ my-app... done
 »   Error: You do not have access to the app my-app.
 »
 »   Error ID: forbidden

Help me please.