Can you provide some docs on how to use it in authentication?

Hi. Do you have docs for using it in authentication? I am able to authenticate for now, but I am not able to set it within the session management.

I have been doing something like that in my login:
user = backend.authenticate(login, password)
if user is not None:
auth.login( request, user)

However, checking if a user is authenticated is not supported for now:
if request.user.is_authenticated():
this throws an error.

Maybe I am using it wrong?