title: What is the timeout for Firebase Phone Auth verification code? And how to set one?
body: <p>In iOS, as per the official docs, there's no method to set a timeout duration for the phone number verification code (or even know the default one). Could some Firebaser clarify why is it so? What's the default timeout duration? If possible, how could one set it in iOS?</p>
  
  <p>On the other hand, in Android, all is good: <a href="https://firebase.google.com/docs/auth/android/phone-auth#send-a-verification-code-to-the-users-phone" rel="noreferrer">https://firebase.google.com/docs/auth/android/phone-auth#send-a-verification-code-to-the-users-phone</a></p>