let text_to_speech = new TextToSpeechV1 ({
  username: 'd4dfcaf5-c2a3-4821-a999-a408d5e45577',
  password: 'dLNgFSuVCNxf',
  headers: {
        'X-Watson-Learning-Opt-Out': 'true'
    }
});

let visualRecognition = new VisualRecognitionV3({
    version: '2018-05-10',
    api_key: 'f42dc57e8405e2aefaa54ef18c49fd1020470793',
    headers: {
        'X-Watson-Learning-Opt-Out': 'true'
    }
});