Okay, finally I got it !
For the person can be interrested by this post,
I have create my own query in the "modules.exemple.conf", and I command to anope to check password in another table (in my own table user already exist)
and after fews tests, it run like a charm ! ^^
Geatly appreciate your help !
(by the way, I dont want to keep password as clear, It was only for a test step.. I'm not stupid)
Best regards;