In order to use it, you have to add it as a dependency, require it as var api = require('cloudtag-api') and call some of the following methods:
api.get_hashtag(hashtag, {exist_callback: a_callback, not_exist_callback: another_callback, api_error_callback: error_callback})
api.set_hashtag(hashtag, data, callback)
api.get_trending_hashtags(callback, error_callback)