How to open "Only registered users can join the server"

[ghost]

What feature do you want to see added?

How can I enable the 'Only registered users can join the serve' feature? I saw this feature in messages_en.yml, but couldn't find the option to enable it in config. yml

Are there any alternatives?

Do I need to add anything myself in the config？

Anything else?

No response

[cloudwww]

# Should unregistered players be kicked immediately?
kickNonRegistered: true