Set exit code for auth check

[james64]

This is a feature request. It would be nice if passbolt auth check exited with non-zero status if not logged in. I admit it's kind of arbitrary to call "logged in" successful. However it would help with writting scripts.

I have a script around passbolt find | fqf and I want to check that I am logged in before I run that. Doing [[ "$( passbolt auth check)" != "You are already logged in." ]] feels fragile.