Configure push notification
Read moreCan firebase send push notifications iOS?
For Apple client apps, you can receive notification and data payloads up to 4000 bytes over the Firebase Cloud Messaging APNs interface . To write your client code in Objective-C or Swift, we recommend that you use the FIRMessaging API.
Read moreHow do I push notifications on Flutter?
How to Add Push Notifications to a Flutter App using Firebase Cloud Messaging
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