AccProtector

This mod is designed for Minecraft servers. It prevents users from logging in under a username that is not the owner of the account.

When you first log in to the server, a menu will appear asking you to enter your password to register. Subsequent logins will also display a login menu.

You can change the password by entering the /resetpassword command.

You can set the number of attempts /attemptsnum [number]
And whether registration is required /regnecessarily true/false