This pre-fills a GitHub App with exactly the permissions intentions needs (Issues + Pull requests read/write, organization Projects read/write, no webhook). Enter the account that owns the board and the repo, then click create.
GitHub opens its App-creation page with everything filled in. Click Create GitHub App, then: generate a private key, copy the App ID, and install the App on the repo that holds your issues. App names are globally unique, so adjust the suggested name if it's taken.
.pem).INTENTIONS_BOT_APP_ID and secret INTENTIONS_BOT_APP_PRIVATE_KEY.