Hello, I wrote some tests against a thing that uses PyGitHub, where I was spying on the Auth objects being passed around and accessing the value of the private_key for a sanity check in tests.

Those tests suddenly started failing with AttributeError: 'AppAuth' object has no attribute 'private_key' on Saturday. So I had to diff the CI run job logs between the failing and passing one, only to find out that a new version of PyGitHub got released. It hasn't yet made its way into the lock file, being in a PR.

I looked for breaking changes @ https://pygithub.rtfd.io/en/latest/changes.html#version-2-6-0-february-15-2025 and haven't seen anything related. It wasn't until I've reached the new features section when I finally saw the PR breaking it — #3065.

Apparently, in addition to adding new features, it also breaks public API.

I suggest adding an entry about this to the breaking changes section of the change log.