Added two config options in config/groups.json:

• enablePasswords (default: true): Dictates whether or not passwords are a thing. If this is false players can still create groups with passwords, but they don't matter when joining groups or inviting.
• logChatMessages: (default: false): Dictates whether or not to log group messages in the server console.

If you need to quickly reload the config, you can use the built-in /reload command to reload resources.