问如何从DialogFlow webhook访问Firebase存储中的音频文件

EN

function saySSML (request, response) {
  const app = new DialogflowApp({request: request, response: response});

  const textToSpeech = '<speak>'
    + 'I can play a sound'
    + '<audio src="https://actions.google.com/sounds/v1/animals/animal_bark_and_growl.ogg">a digital watch alarm</audio>'
    + '</speak>';
  app.ask(textToSpeech);
}

function saySSML (request, response) {
  const app = new DialogflowApp({request: request, response: response});

  // Get a reference to the storage service, which is used to create references in your storage bucket
  var storage = firebase.storage();

  // Create a storage reference from our storage service
  var storageRef = storage.ref();

  const textToSpeech = '<speak>'
    + 'I can play a sound'
    + '<audio src="https://firebasestorage.googleapis.com/v0/b/andrewdittmer-c301f.appspot.com/o/alarm_clock.ogg?alt=media&token=d66a4055-5365-4061-b50d-0b6a126841f3">a digital watch alarm</audio>'
    + '</speak>';
  app.ask(textToSpeech);
}