Atlantis

```403 Resource not accessible by integration```
usually means that your access token doesn't have enough permissions granted

or your github app, depends on what you're using

I think in the case of lack of permissions there would be forbidden access, here Atlantis hits a not supported method according to GitHub docs 

My GitHub app has read write access to commit statuses 

from github you get 403 or 404 for lack of permissions, is all over the place

JFYI: I made an issue for this problem.
<https://github.com/runatlantis/atlantis/issues/3285>

but Atlantis wants to update statuses and has full permissions for it, i tried to give even more permissions but the error still occurs

I added a comment where the code may need to be updated. Thank you for creating the issue. Looking forward to a pr that works for both github app and github non app