Password protect entire wiki for private docs?

[ReessKennedy]

UPDATE: Figured out this is possible just by flipping on REGISTERED ONLY for everything.

Searched within my build and in the docs and don't see a method so assuming this isn't supported.

Ideas for protecting

1. Apache or NGNIX server-level password. Cons of this: Annoying to set up an extra thing ... easy to set up one global but annoying to manually set up unique user logins when the user will ALSO have to sign into Otter afterwards anyway -- so would have to enter two passwords.
2. Cloudflare Zero Trust: Secure and can use emails for verification as "passwords" but still means users must pass through two barriers. Cons of this: Extra management to also log into Cloudflare when new users need to access wiki.
3. Host internally only, on intranet, and use VPN to access. Cons: We don't want to give everyone VPN access to our network and this is more work too.
4. Build password protection for entire blog to Otter: Would be cool! 👍👍👍

More info

We have some private, company docs we host just at the office with Otter on our intranet but now need to give some folks working remotely access so need to put on public internet and have to password protect them.