Members of Twilio Queue undefined

I am getting an error when attempting to access members of a queue.

I have tried both methods below for adding members to the queue in case I was mistaken about how the system worked. (I started using the Enqueue method)

<?xml version="1.0" encoding="UTF-8" ?>
 <Response>
    <Dial>
       <Queue waitUrl="http://ift.tt/1G1Rowt">support</Queue>
    </Dial>
 </Response>

and

 <?xml version="1.0" encoding="UTF-8" ?>
 <Response>
     <Enqueue waitUrl="http://ift.tt/1G1Rowt">support</Enqueue>
 </Response>

Both of these seem to work in adding the call to the queue and playing the hold music

I have also checked to make sure I have the correct SID for the queue

Running the code

 client.queues.list(function(err, data) {
       data.queues.forEach(function(queue) {
            console.log(queue.friendlyName + ": " + queue.sid);
       });
   });

give me the result

support: QUxxxxxxxxxxxxxxxx6

Yet when I have calls in the queue holding and try to extract data using an example right from the twilio API page at http://ift.tt/1G1RmEM

 client.queues('QUxxxxxxxxxxxxxxxx6').members.list(function(err, data) {
     data.members.forEach(function(member) {
         console.log(member.Position);
     });
 });

I get the following error

 GET /inbound/call/agent 200 39.997 ms - 73

 /var/www/tcc/node_modules/twilio/node_modules/q/q.js:126
                     throw e;
                           ^
 TypeError: Cannot call method 'forEach' of undefined
     at /var/www/tcc/routes/index.js:348:20
     at /var/www/tcc/node_modules/twilio/node_modules/q/q.js:1920:17
     at flush (/var/www/tcc/node_modules/twilio/node_modules/q/q.js:108:17)
     at process._tickCallback (node.js:415:13)
 17 Feb 14:02:42 - [nodemon] app crashed - waiting for file changes before starting...