How to get the current user id from Firebase in Flutter

Issue

I am trying this -

final Future<FirebaseUser> user = auth.currentUser();

but the problem is that instead of making a document by the "userid" it is making a document by the name of -

Instance of 'Future<FirebaseUser>'

This is literally my documents name right now, but I want to make it the userid specifically.

What should I do?

Solution

Update (2020.09.09)

After firebase_auth version 0.18.0

Few breaking updates were made in firebase_auth 0.18.0. FirebaseUser is now called User, currentUser is a getter, and currentUser is synchronous.

This makes the code for getting uid like this:

final FirebaseAuth auth = FirebaseAuth.instance;

void inputData() {
  final User user = auth.currentUser;
  final uid = user.uid;
  // here you write the codes to input the data into firestore
}

Before firebase_auth version 0.18.0

uid is a property of FirebaseUser object. Since auth.currentUser() return a future, you have to await in order to get the user object like this:

final FirebaseAuth auth = FirebaseAuth.instance;

Future<void> inputData() async {
  final FirebaseUser user = await auth.currentUser();
  final uid = user.uid;
  // here you write the codes to input the data into firestore
}

Answered By - dshukertjr