I see examples where you have to extract device tokens and store them in a db to be able to send notifications to that device.
I wondered if I could use Firebase user ids to send a select list of users notifications skipping the need for tokens?
2 Answers
No firebase is not support to send notification using userID.
You have to integrate FCM package for getting token if firebase using below link : https://pub.dev/packages/firebase_messaging
After getting token then only you can use this token and send the notification.
Other way of sending notification is the topic. For topic i am giving you below link : https://www.filledstacks.com/post/push-notifications-in-flutter-using-firebase/
No, you can't. You need to implement a custom notification sender from the firebase cloud function to send by user IDs. But you can't ignore the FCM tokens. You must register a valid FCM token of the user's device to trigger per device notification. Check the following guideline:
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