This defines if and how new users can create accounts. There are 3 options:
- closed no new user can sign up
- open new users can sign up
- invite new users can sign up but require an invitation key
This applies only to the REST sevrer component.
invite is intended to open the application only to some
users. The admin can create these invitation keys and distribute them
to the desired people. For this, the
new-invite-password must be
given. The idea is that only the person who installs docspell knows
this. If it is not set, then invitation won't work. New invitation
keys can be generated from within the web application or via REST
curl, for example).