API has not been used in project 563584335869 before or it is disabled

Original error message

Error: 7 PERMISSION_DENIED: Cloud Text-to-Speech API has not been used in project 563584335869 before or it is disabled. Enable it by visiting https://console.developers.google.com/apis/api/texttospeech.googleapis.com/overview?project=563584335869 then retry. If you enabled this API recently, wait a few minutes for the action to propagate to our systems and retry.

The project id 563584335869 is not yours. It is firebase-cli cloud project’s project-id. So, the problem is because you have to set the configuration by yours, but you didn’t.

Solution

const textToSpeech = require("@google-cloud/text-to-speech")
const keyfile = require(".././my-project.json")
const config = {
  projectId: keyfile.project_id,
  keyFilename: require.resolve(".././my-project.json")
};
const TTS_Client = new textToSpeech.TextToSpeechClient(config)

Now, you can be passed with your configuration.

LINK:
https://github.com/googleapis/nodejs-text-to-speech/issues/26#issuecomment-397528174

“my-project.json” is a file of your credential what allow you can access to google API.

And you have to make your credential and download that in your cloud console before.

Creating and managing service account keys | Cloud IAM Documentation