How can I create a smart app that does not appear in the 'Life Tab' and 'Add Service' list?

When entering the device plugin, I want to install the smart app in the background and create a smart app that does not appear in the ‘Life Tab’ or ‘Add Service’ list for the user.

In the Smart Things documentation, there is a value called ‘hidden’ in the ‘classifications’ field. Is this ‘hidden’ setting sufficient?

Or something that I can’t set?

In addition, let me know ST smart app developer’s or manager’s contact point.

Thank you.