title: Can't connect to redis using django-redis
body: <p>I've got a django project using django-redis 3.8.0 to connect to an aws instance of redis. However, I receive <code>ConnectionError: Error 111 connecting to None:6379. Connection refused.</code> when trying to connect. If I ssh into my ec2 and use redis-py from the shell, I am able to read and write from the cache just fine, so I don't believe it's a security policy issue. </p>