Sub Gallery Access

Please make a feature where you can decide if a Sub Gallery is accessible for everyone or not.

I would like to make a main Gallery for weddings with only Sub Galleries for all my clients in it. I then would love to have the feature to decide if the Sub Gallery is accessible for everyone who visits my Main Gallery or not - because not everyone wants to be public.

The download of the gallery or individual pictures should only be available for my clients and their guests with a password.