GDM login without using a password

[Roey Dror]

> AFAIK the automatic login feature allows you to nominate a user to
> automatically log in as... it doesn't ask for the password but I think
> one can be set (so it doesn't need to be empty).

As I said, the automatic login feature is not what I'm looking for.
I need to set up more than one user that is able to login without a password.
The computer is a home computer, so local security is not an issue.

-- 
Roey