Trying to use Twilio with Meteor, ReferenceError: Twilio is undefined

As a preface to this, I'm very new to Meteor and have never used Twilio before, so I'm probably just making a stupid mistake somewhere.

I am using the Twilio API bindings found here and trying to get a simple piece of code that works to send an SMS message inside Meteor .methods. Here's the event trigger and method function:

if (Meteor.isClient) {
    Template.twilioPlayground.events({
        "click button": function() {
            Meteor.call("sendSMS");
        }
    });
}

Meteor.methods({
    sendSMS: function () {
        twilio = Twilio('i put my account sid here', 'and my auth token here');
        twilio.sendSms({
            to:'+7199634882', 
            from: '+17194530451', 
            body: 'This is a test'
        }, function(err, responseData) { //this function is executed when a response is received from Twilio
            if (!err) {
                console.log(responseData.from); // outputs "+14506667788"
                console.log(responseData.body); // outputs "word to your mother."
            }
        });
    }
});

      

        
        
        
      

    

So when this event fires, I get the following error:

ReferenceError: Twilio is not defined
at Meteor.methods.sendSMS (http://localhost:3000/myTodoApp.js?8ae55884eab4c6a28ef9da8344fcf0b9d15c24ac:194:18)
at http://localhost:3000/packages/ddp.js?1f971b2ac9f4bdab7372cb5098ed1e26ff98dfb2:4239:25
at _.extend.withValue (http://localhost:3000/packages/meteor.js?61916b1060b33931a21f104fbffb67c2f3d493c5:945:17)
at _.extend.apply (http://localhost:3000/packages/ddp.js?1f971b2ac9f4bdab7372cb5098ed1e26ff98dfb2:4230:54)
at _.extend.call (http://localhost:3000/packages/ddp.js?1f971b2ac9f4bdab7372cb5098ed1e26ff98dfb2:4108:17)
at Object.Template.twilioPlayground.events.click button (http://localhost:3000/myTodoApp.js?8ae55884eab4c6a28ef9da8344fcf0b9d15c24ac:106:20)
at null.<anonymous> (http://localhost:3000/packages/blaze.js?77c0809654ee3a10dcd5a4f961fb1437e7957d33:3103:18)
at http://localhost:3000/packages/blaze.js?77c0809654ee3a10dcd5a4f961fb1437e7957d33:2371:30
at Object.Blaze._withCurrentView (http://localhost:3000/packages/blaze.js?77c0809654ee3a10dcd5a4f961fb1437e7957d33:2029:12)
at null.<anonymous> (http://localhost:3000/packages/blaze.js?77c0809654ee3a10dcd5a4f961fb1437e7957d33:2370:26)

      

        
        
        
      

    

Apart from adding the mrt: moment and mrt: twilio-meteor packages to the project, I did not configure any more. Any help is appreciated.