Create a Google Cloud Project.
refer ‘Creating a service account’ section on this official guide
But, you don’t need the other part.
If you have done to make a new project and downloaded the credential file, store as secure.
I had located the file to here.
Install Libraries what you need
We need these modules
So, execute this
npm i @google-cloud/text-to-speech dotenv lodash
Set the .env file
write a credential location into the .env file.
Write and try the main code
So, you could get a listenable mp3 file