omab/django-social-auth — pull request #430 by estebistec (2012-08-06 04:54:28+00:00)
Title: Provide a more specific exception type for duplicate social account usage

Defined AuthAlreadyAssociated for when a 2nd user tries to associate a particular social account (e.g., twitter handle).

I also may add a configurable middleware for handling this and other specific exceptions pending the disucssion on issue #428 (whether or not the middleware is needed or the functionality is covered by social_auth.utils.log_exceptions_to_messages.