:param lastname:

        :param active:

        :param admin:

        :param ldap_dn:

        """

        if UserModel().get_by_username(username):

            raise JSONRPCError("user `%s` already exist" % username)

        if UserModel().get_by_email(email, case_insensitive=True):

            raise JSONRPCError("email `%s` already exist" % email)

            # generate temporary password if ldap_dn

            password = PasswordGenerator().gen_password(length=8)

        try:

            user = UserModel().create_or_update(

                username=Optional.extract(username),

                password=Optional.extract(password),

                email=Optional.extract(email),

                firstname=Optional.extract(firstname),

                lastname=Optional.extract(lastname),

                active=Optional.extract(active),

                admin=Optional.extract(admin),