code: def synchronize(self, graph_data=None):
          
          profile = graph_data or self.graph.get('me')
  
          self.facebook_username = profile.get('username')
          self.first_name = profile.get('first_name')
          self.middle_name = profile.get('middle_name')
          self.last_name = profile.get('last_name')
          self.birthday = datetime.strptime(profile['birthday'], '%m/%d/%Y') if profile.has_key('birthday') else None
          self.email = profile.get('email')
          self.locale = profile.get('locale')
          self.gender = profile.get('gender')
          self.extra_data = profile
          self.save()
docs: Synchronize ``facebook_username``, ``first_name``, ``middle_name``,
          ``last_name`` and ``birthday`` with Facebook.
  
          :param graph_data: Optional pre-fetched graph data