Q: comment retrouver mon identifiant

Google translate:

I lost my password and I get no response APPLE I find that the issue raised abnormal are still without answers

If Apple ID password then:

How do I change or recover a forgotten Apple ID Password?

If you've forgotten your Apple ID Password or want to change it, go to My Apple ID and follow the instructions. SeeChanging your Apple ID password if you'd like more information.

If log-in password then:

Forgot Mac Password? How to Reset Your Mac Password (with or without CD)

Change the Admin Password with Mac OS X Single User Mode

Reset mac mini admin password: Apple Support Communities