There are many ways of keeping user signed-in to a flutter application. In this tutorial we going to use firebase Auth method authStateChanges(). Firebase Auth enables you to subscribe in realtime to this state via a Stream .
Read moreHow do I know if someone logged in to Firebase?
How do I detect if a user is already logged in Firebase?
Read moreHow do you check if a user is Realated in flutter firebase?
Check if user is logged in Firebase Auth provides you with a current user to check. They keep track of the login status on disk so you can simply check if the user is null or not to confirm if we’re logged in. Open up the AuthenticationService and add a new function that returns a type Future<bool> .
Read moreHow can you tell if someone is logged in?
When to check if the user is logged in?
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