version - 1.3
To update, just drop the file into the plugins folder and restart the server. New lines will appear by themselves

• Removed automatic configuration saving when the plugin is turned off
• Added a restriction on the registration of accounts for one IP.
• Added a notification for everyone with OP.

A notification will be sent when a user with more than one account logs in.

Highlights the account from which the authorization was made in green. The rest are gray.

The message as well as the others can be completely changed in the configuration