hi Lazaro! there have been some new developments, some noted in the book, which has been updated for Xcode 11 and/or in this forum:
- [ ] PushNotifications app no longer works in latest Catalina; can push notifications to simulator or adapt sendEncrypted.php file: Push Notifications 路 Getting Started | raywenderlich.com - #5 by audrey
- [ ] Silent notifications require HTTP headers: Push Notifications 路 Silent Notification | raywenderlich.com - #7 by iosdevereaux
- [ ] Postgres/Vapor changes: Push Notifications 路 Vapor Server | raywenderlich.com - #2 by mazen_kasser