Problem:
A user enters for example as: maxibon
but then you can enter with the same user with a different name! for example: MaxiBon and the authme accepts it as the same account! creating two different accounts on the server !.
Please I need that each user can only enter with their REAL name! It is a great BUG!

Server version: paper-1.14.4
AuthMe version 5.6.0-SNAPSHOT-b2230

Do you have the following in your config?

    preventOtherCase: true

or is it set to false for some reason?

now it works! but this option is very important! please! it must always be activated! because if they don't hack your server the way they want! :( fixed but please let it come in the activated settings, I have also had to find another plugin for this problem but thanks for everything.