topic.js

var gcloud = require('google-cloud');
var pubsub = gcloud.pubsub({
  projectId: 'in-full-gear',
  keyFilename: __dirname + '/../secret/auth_key.json'
});

var topic = pubsub.topic('debate_tweets');

topic.get({autoCreate : true}, function(err, topic, apiResponse) {
  if(err){
    console.log('Error getting topic : ', err);
  }
  else{
    startTracking(topic)
  }
});