Additionally, this commit adds acceptance testing for `gh auth login` and
`gh auth logout`.
The --token flag was necessary for adding testing for `gh auth login`
because the current implementation with `--with-token` appears to be
broken. It hangs, waiting for user input, but user input doesn't exit it.
Additionally, it appears that `--with-token` is intended to allow for TTY
input of an auth token, but it isn't implemented.
`--with-token` does work when used with the redirect operator `<` when the
token is saved in a file. However, due to limitations of testscripts, I
could not use a file for saving the token in a repeatable manner. Thus,
implementing the `--token` flag seemed like a quick solution to validate
that the direction I was going during testing was valid.
Whether the flag stays or not is up for discussion, and I'd love to get
input on that from the team.
52daa9cf7d