Support for Apps requring enterprise-level access

[kmaehashi]

It would be great if the action can support generating tokens for enterprise installations. This will allow us to automate daily operations on enterprise management within GitHub Actions.

https://github.blog/changelog/2025-07-01-enterprise-level-access-for-github-apps-and-installation-automation-apis/

[dgteixeira]

+1 on this.

We are also in need of this, since we are starting to use Enterprise-level GitHub Apps.

I noticed that there is already a PR opened for this exact feature #263, however, it is apparently stuck due to the lack of an API to get an enterprise installation directly, see comment.

@hpsin, you mentioned here, that you would open an issue for this, did you get to that? If so, could you share here with us ? :)