Add Instructions On How To Authenticate In A Deploy Step about heroku-buildpack-cli

[alexfinnarn]

Thanks @rlueder for the explanation. I can also say I ended up using this method of directly setting HEROKU_API_KEY config var in the pipeline settings and it just works.

This is kind of documentation...and good enough for people searching for the answer, but I am too busy now to formally add to docs. So, whoever monitors these issues can close this one if no one has time to add to docs. I no longer have this issue.

[rlueder]

After spending more time on this than I'm willing to admit I eventually got it working by directly setting HEROKU_API_KEY under my pipeline settings (see attached)

On your local terminal (assuming you have already logged into the CLI app with your username/password) run: heroku authorizations:create --short this will create a long-lived token you can use to set HEROKU_API_KEY

You'll also want to wrap your command inside of heroku run e.g.
heroku run "heroku pg:copy stage-app-name::$DATABASE_URL $DATABASE_URL -a $HEROKU_APP_NAME --confirm $HEROKU_APP_NAME" -a $HEROKU_APP_NAME