How do I prevent Firebase authStateChanges from triggering every two minutes in Flutter?

The behavior you’re seeing is due to Firebase refreshing the user’s ID token periodically—even when the overall sign‐in state doesn’t change. Although the user remains signed in, Firebase creates a new User instance when the token is refreshed, which triggers the StreamBuilder.

To mitigate this issue you have a couple of options:

1. Custom Distinct Comparison:
   Instead of relying on the default equality comparison (which likely treats two distinct User instances as different even if their uid is the same), use the .distinct() method with a custom comparison that ignores changes that aren’t relevant (for example, comparing only the uid):

   DARTCopied
   stream: myAppKey.currentState!
       .getFirebaseAuth()
       .authStateChanges()
       .distinct((previous, next) => previous?.uid == next?.uid)

   This tells the stream to only emit a new value when the uid really changes.

2. Optimize the Widget Build:
   If you can’t avoid the new User instances, you might cache or conditionally rebuild parts of your UI based on your own criteria (for example, by comparing the current user’s uid to what you previously had).

It’s important to note that Firebase’s periodic token refresh is expected behavior and improves security. The solution involves filtering or optimizing your build logic to ignore the “insignificant” changes.