In Flutter, using await stores data correctly, but not collection name and not using await does not store data correctly, but correct collection name

Question

My current code uses:

var currentUID = await database.getCurrentUserID();

Running this function with await on this line of code stores data in Firestore with correct user ID but time is always set to 0:

Future<void> addUserTime() async {
  var currentUID = await database.getCurrentUserID();

  return await database.workoutCollection
      .doc(currentUID.toString())
      .set({
        'Workout Time': format(duration),
      })
      .then((value) => print('Time added'))
      .catchError((error) => print('Failed to add time to database'));
}

Without using await like the previous line of code like this:

var currentUID = database.getCurrentUserID();

Firestore shows this: This is the firebase output. Wrong UserID from Firebase Authentication, but time is always set to what the user logged:

Future<void> addUserTime() async {
  var currentUID = database.getCurrentUserID();

  return await database.workoutCollection
      .doc(currentUID.toString())
      .set({
        'Workout Time': format(duration),
      })
      .then((value) => print('Time added'))
      .catchError((error) => print('Failed to add time to database'));
}

This is my database class where I call the getCurrentUserID() function:

How can I get both the correct UID and correct time the user logged?

Answer 1

FirebaseAuth stores the current user once it's authenticated in FirebaseAuth.instance.currentUser, if we look into this property we will find that the type is User?, not Future<User?>, hence you don't need to await to get the currentUser, simply:

return FirebaseAuth.instance.currentUser?.uid;

Additionally, currentUser?.uid returns a String, so no need to call .toString().

Assuming that the duration is not 0, with these modifications the code should work, for further reference here's a DartPad example that updates a user record based on currentUser.uid.