Authenticate with OpenID when writing a comment

Question

Hi,

I am writing a system of comments in DJango and I want to authenticate my users with OpenID.

I see a lot of solutions that integrate DJango and OpenID, but all of these consist on a login form.

I don't want to provide a login form to my users (in fact, i don't want to have a users table).

In my comment form there is a URL field. I want that, when the user sends the comment, this field was used to authenticate with the OpenID provider.

Are there any solutions like this in Python/Django?

Thank you