Exitcodes: Non-0 exitcode for runs with errors

[newhinton]

Hi!

I am using audible-cli in a bunch of scripts. Sometimes downloads are not possible and error out.

When that happens, i do get a log-line "Error: xyz", but the exit code is still 0.

It would be helpful for scripting if the errorcode could convey more information about that. I'd like a non-zero errorcode at the minimum if errors did occur at all.

Thanks!