Memcache with credentials

[Pkmmte]

Firstly, I'd like to say thank you very much for this example! It has been a great help in getting my Graphcool instance to connect with Apollo and enable in-memory caching!

Anyways, I found that Apollo Engine has problems trying to connect to a memcache service with credentials such as Memcachier or Memcached Cloud. I was unable to find similar services that don't require credentials. Have you been able to find a workaround for this? I ask because I currently run this on a Heroku dyno with limited memory and that's causing me problems with Apollo Engine's memory cache.