var AYLIENTextAPI = require('aylien_textapi');
var textapi = new AYLIENTextAPI({
  application_id: "YourApplicationId",
  application_key: "YourApplicationKey"
});
textapi.sentiment({'text': 'John is a very good football player!'}, function(error, response) {
  if (error === null) {
    console.log(response);
  }
});