Describe the feature or problem you’d like to solve

I have two accounts on github each with access to a different set of private repositories. Currently I use a combination of git's [IncludeIf ...] config and a custom config which overrides the SSH private key I use for certain repositories. E.g.:

In ~/.gitconfig:

[includeIf "gitdir:~/work/"]
  path = ~/work/.gitconfig

and in ~/work/.gitconfig:

[core]
  sshCommand = "ssh -i ~/.ssh/work"

It will be great if the credentials for gh can also be configured per repository as well.

Proposed solution

There are a bunch of options I can think of:

• Allow overriding gh config by a file in a local clone's .git directory
• Allow defining rules in the gh config which defines which repos/orgs should use which credential. E.g.

github.com/google:
  - user: gemployee
    oauth_token: ...

github.com/microsoft:
  - user: msemployee
    oauth_token: ...

github.com:
  - user: personal
    oauth_token: ...

How will it benefit CLI and its users?

It will allow Github users with multiple accounts of varying access to seamlessly work on different repositories.