I see the Google User Data policy warning message, what is the problem?
This is not a code error. This is the sensitive element for the google: “android.permission.READ_PHONE_STATE”, but I used it, because this permission can detect the incoming call in the phone when you use the radio. (I mute the radio when you talk in your phone.)
One your document is ready, just upload it on your Google Drive with only ‘view’ permission and then paste the link of that document in your app’s console.