I understand that in OpenERP users and employees are two different objects. Each have their own properties, like name, address and photo. This makes sense, as in some companies, an employee doesn't have access to the ERP and in some companies other people (like partners) have access to the ERP.

But is there any module that automatically generates a user when I add an employee and if I modify an employee (e.g. change their photo or their name), it also updates the user?