title: iOS: Invalid registration token. Check the token format
body: <p>I am new for Firebase as well as for iOS. I am trying to send push notification using FCM.</p>
  
  <p>I registered an iOS app on FCM. Both <code>.p12</code> certificates added. Code developed according to FCM.</p>
  
  <p>While sending notification through the <a href="https://firebase.google.com/docs/notifications/ios/console-device" rel="noreferrer">Firebase Console</a>, I'm getting the error <code>Invalid registration token. Check the token format.</code>. I don't what mistake I did.</p>
  
  <p><img src="https://i.stack.imgur.com/ItxHX.png" alt="FCM Console"></p>