title: `User` is not part of the schema for this Realm - How to find out whether 'User' exists?
body: <p>Say I wanna know whether User is empty.</p>
  
  <p>This is my code: </p>
  
  <pre><code>public boolean isEmpty() {
      Realm myRealm = Realm.getInstance(this);
      User results1 = myRealm.where(User.class).findFirst();
      return results1 == null;
  }
  </code></pre>
  
  <p>If it's the first time using the app, I need to know that, because if that's the case, I need to ask the user to fill the form. (It's not really authentication, just a simple form).</p>
  
  <p>In this situation, how can I know whether User exists without having to create a record.</p>
  
  <p>Edit:</p>
  
  <p>Here's the stack:</p>
  
  <pre><code>FATAL EXCEPTION: main
        java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.ga.xuser/com.example.ga.xuser.View.Activities.Profile}: java.lang.IllegalArgumentException: User is not part of the schema for this Realm
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
        at android.app.ActivityThread.access$600(ActivityThread.java:141)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
  </code></pre>