Allowing not requiring redis

I know this is not a big deal and redis will be necessary and required most times.

It turns out I'm working on a very simple app that doesn't require users, auth, thus redis is really not necessary.

@@ -6,6 +6,11 @@ var RedisStore = require('connect-redis')(session)
 
 exports = module.exports = function(logger, settings) {
 
+  // Allow not needing redis
+  if (!settings.redis) {
+    return false
+  }
+
   var connection = new RedisStore(settings.redis)
 
   connection.on('error', function(err) {