How to edit config variables in Heroku [duplicate]

I have an app running on Heroku with a small handful of settings that I want to change from time to time, and I'd like to use Heroku config vars to store these settings so they persist durably.

I know I can modify the settings from the Heroku dashboard or the Heroku CLI, but I'd like to modify them from within the app UI.

I can't seem to figure out how to modify the app's Heroku config from within the app code. If I simply modify the dyno's environment, for example, those changes do not persist to the app's config.

Solution 1:

You can use Heroku Platform API for this. Especially this part. There is also a ruby client