twitter.js

var Twitter = require('twitter');

var client = new Twitter({
	consumer_key: process.env.TWITTER_CONSUMER_KEY,
	consumer_secret: process.env.TWITTER_CONSUMER_SECRET,
	access_token_key: process.env.TWITTER_ACCESS_TOKEN_KEY,
	access_token_secret: process.env.TWITTER_ACCESS_TOKEN_SECRET
});

client.stream('statuses/filter', {track: 'jaguars'}, function(stream) {
  stream.on('data', function(tweet) {
    console.log(tweet.text);
  });
 
  stream.on('error', function(error) {
    throw error;
  });
});