'Firebase Cloud Messaging Unsubscribe from all topics
I have a simple news app for my college. To send notifications, I use firebase cloud messaging
My problem: I want to send notifications based on the version of my app from the API. when my app version is 2. I will send a notification to the topic v2. but when users update the app to v3 and I need to maintain v2 of my app then how can I target v3 only
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Source: Stack Overflow
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