<?xml version="1.0"?>
<!-- the user list is editable, but one cannot add or delete rows -->
                <tree string="Users" editable="bottom" create="false" delete="false">
                    <field name="user_id" invisible="1"/>
                    <field name="user_login" force_save="1"/>
                    <field name="new_passwd" required="True" password="True" width="20px"/>
                </tree>
            