Sorry for the last empty Re: Hi Juan You can try : confirmation = "ok" for x in self.acl_users.getUserNames(): if (x==username): confirmation="error" break if confirmation=='ok': self.acl_users._addUser(username,password,confirmpass,liste_role,0) Sylvain -----Message d'origine----- De : zope-admin@zope.org [mailto:zope-admin@zope.org]De la part de Juan Garcia Garcia Envoyé : vendredi 17 août 2001 10:11 À : zope@zope.org Objet : [Zope] How to know if a user already exists? I have a form with two fields, one to write a login and the other for the password. When the anonymous user pushs the submit button I will create a new user with the id and password written. But I want to know, before doing this action, if the login already exists in the folder 'acl_users'. I tried with the function 'has_key' but it didn't work. If anyone has do it before, please send me the answer. Thank you.