title: I need a working example demo of the <firebase-auth> or Polymerfire element in Polymer 1.x
body: <p>Please share a working code example of how to use the <code>&lt;firebase-auth&gt;</code> Polymer element.</p>
  
  <p>I have a custom <code>&lt;paper-button&gt;</code> I'm trying to make into a login button for user authentication. I want to use the Firebase to perform the user authentication service.</p>
  
  <p><a href="https://elements.polymer-project.org/elements/firebase-element?active=firebase-auth" rel="nofollow noreferrer">Here is the user documentation</a>.</p>
  
  <p><a href="https://github.com/GoogleWebComponents/firebase-element" rel="nofollow noreferrer">Here is the Github repository</a>.</p>