title: How to handle push notification allow from settings in iOS
body: <p>I have Integrated the push notification in my app. I am getting the device token in my <code>AppDelegate</code> and sending to the server in my <code>LoginViewController</code>. When alert comes if user click on "Don't allow" I am not calling my device registration service. But I have no idea how to handle this scenario.</p>
  
  <blockquote>
    <p>If user click on don't allow in the push notification alert and go inside the app, then he open device settings and enable the push notification.</p>
  </blockquote>
  
  <p>In this case how can I call my device registration service?
  Please help me
  Thanks</p>