Lists a GitHub repo's collaborators (users granted access via teams, or outside invited collaborators) and their role name permissions using the GitHub API
If no repo is given, infers from local repo's git remotes
Output format:
<repo> <user1> <permission>
<repo> <user2> <permission>
This is most useful for GitHub Enterprise repos that are part of an organization to audit access across repos, especially when combined with github_foreach_repo.sh.
For many personal repos you'll likely only see your own user with admin permissions