title: Is it possible to register user via firebase auth with just sms service and offline, i.e WITHOUT INTERNET
body: <p>I know to register firebase user via email and phone auth using internet</p>
  
  <p>Is it possible to create or register with just an sms service and register user to firebase </p>
  
  <p>PS:I have checked of Twillio and Angular Js</p>
  
  <pre><code>mAuth.createUserWithEmailAndPassword(email, password);
  </code></pre>