'Where to write the logic to upload FCM token or to subscribe to any topic while using FCM service with Firebase?
I am new to flutter and Firebase. I have registered my android app with firebase. My final goal is to send notifications to all the users automatically with a cloud function. So far, I know either I need to store the list of FCM tokens of all the users or subscribe them to perticular topic. I was thinking of going with subscribing to the topic, so that I will not have to store the tokens in my firestore. So, my question is where should I write
FirebaseMessaging.instance.subscribeToTopic("drawNotifications");
Because, If I put it in the main or initState, then it will be called everytime the user runs the app and if I do so, is it the right way to? Please feel free to let me know if I need to explain it more clearly as this is my very first question in Stackoverflow.
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Source: Stack Overflow
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