Override python-social-auth pipeline to only accept authorized users.

[willjschmitt]

No description provided.

[willjschmitt]

Maybe the right thing to do is to allow registrations of any user, but block all actions on users that don't have a flag checked.

[willjschmitt]

Checking a flag might require modification to the entire application, though. Modifying the pipeline would be a catchall and prevent users from any access unless granted.

[willjschmitt]

I think a polished solution would be a full login followed by a request to admins to activate the account. Provides the least barrier to entry.