old_contents: from django.conf import settings
  from django.core.exceptions import ImproperlyConfigured
  
  
  def get_usersettings_model():
      """
      Returns the ``UserSettings`` model that is active in this project.
      """
      from django.db.models import get_model
  
      try:
          app_label, model_name = settings.USERSETTINGS_MODEL.split('.')
      except ValueError:
          raise ImproperlyConfigured('USERSETTINGS_MODEL must be of the '
                                     'form "app_label.model_name"')
      usersettings_model = get_model(app_label, model_name)
      if usersettings_model is None:
          raise ImproperlyConfigured('USERSETTINGS_MODEL refers to model "%s" that has '
                                     'not been installed' % settings.USERSETTINGS_MODEL)
      return usersettings_model
  
  
  def get_current_usersettings():
      """
      Returns the current ``UserSettings`` based on
      the SITE_ID in the project's settings
      """
      USERSETTINGS_MODEL = get_usersettings_model()
      current_usersettings = USERSETTINGS_MODEL.objects.get_current()
      return current_usersettings
  
new_contents: from django.conf import settings
  from django.core.exceptions import ImproperlyConfigured
  
  
  def get_usersettings_model():
      """
      Returns the ``UserSettings`` model that is active in this project.
      """
      from django.db.models import get_model
  
      try:
          app_label, model_name = settings.USERSETTINGS_MODEL.split('.')
      except ValueError:
          raise ImproperlyConfigured('USERSETTINGS_MODEL must be of the '
                                     'form "app_label.model_name"')
      usersettings_model = get_model(app_label, model_name)
      if usersettings_model is None:
          raise ImproperlyConfigured('USERSETTINGS_MODEL refers to model "%s" that has '
                                     'not been installed' % settings.USERSETTINGS_MODEL)
      return usersettings_model
  
  
  def get_current_usersettings():
      """
      Returns the current ``UserSettings`` based on
      the SITE_ID in the project's settings
      """
      USERSETTINGS_MODEL = get_usersettings_model()
      try:
          current_usersettings = USERSETTINGS_MODEL.objects.get_current()
      except USERSETTINGS_MODEL.DoesNotExist:
          current_usersettings = None
      return current_usersettings
  
subject: Update 'get_current_usersettings' to catch 'DoesNotExist' error