title: Getting an error: "Has no exported member AngularFire, AuthProviders, AUthMethods, FirebaseListObservable" in AngularFire2?
body: <p>I am new to Angular 4, so I am creating a firebase chat app with Angular 4, and then when I import some modules like this: </p>
  
  <pre><code>import { AngularFire, AuthProviders, AuthMethods,FirebaseListObservable } from 'angularfire2';
  </code></pre>
  
  <p>I get an error for each module that says </p>
  
  <blockquote>
    <p>Has no exported member AngularFire, AuthProviders, AUthMethods, FirebaseListObservable. </p>
  </blockquote>
  
  <p>Thank you</p>