Login message middleware

from django.conf import settings
from django.core.urlresolvers import reverse

class LoginMessageMiddleware(object):
	def process_request(self, request):
		from django.conf import settings
		if request.user.is_authenticated():
			if not request.session.get(settings.LOGIN_SUCCESS_KEY):
				request.user.message_set.create(message="You have successfully logged in.")
				request.session[settings.LOGIN_SUCCESS_KEY] = True
		if request.path == reverse('auth_logout'):
			try:
				del request.session[settings.LOGIN_SUCCESS_KEY]
			except KeyError:
				pass