pub async fn probe_key_command(argv: &[String]) -> Result<(), KeyCommandError>Expand description
Run one entry’s api_key_command and discard the credential.
For doctor, whose contract is “what will actually run here”: it has to
really invoke the helper, because a helper that no longer authenticates is
precisely what api_key_command exists to make visible. Returning ()
rather than the key is what makes printing it impossible at the call site,
instead of a rule the reporting code has to remember.