I'm wondering if it's possible to write data into the relation table trough xmlrpc calls? I've got a web form that creates a user for a odoo demo instance. I'm trying to add groups to a that user. I get the group ids from the res.groups table. Now I need to add the records to the relation table res.groups.users.rel and I know I just can't directly write into it.

If it would be a local instance I could just do user.groups_id = (the id for the group that manages employees)

Is it possible to insert m2m relations trough xmlrpc calls? If it is, how?