title: Allow Face ID permission alert
body: <p>My app (running in iPhone X Simulator Xcode 9.0.1) is asking me for permission to use Face ID.</p>
  
  <p>The alert says:</p>
  
  <p><code>Do you want to allow &lt;appName&gt; to use Face ID?
  This app was designed to use Touch ID and may not fully support Face ID.</code></p>
  
  <p>I was expecting that the few changes I made to the new APIs in the <code>LocalAuthentication</code> framework (e.g. <code>biometryType</code>) was supposed to basically work for Face ID.</p>
  
  <p>Is there something else I need to do to make it so my app <em>is</em> designed to fully support Face ID? </p>