User called to null

[jeremiahseun]

The issue from the search screen.

@override void initState() { super.initState();
_firebaseRepository.getCurrentUser().then((User user) {
  _firebaseRepository.fetchAllUsers(user).then((List<User> list) {
    setState(() {
      userList = list;
    });
  });
});
}

From the FirebaseRepository class

Future<List<User>> fetchAllUsers(User user) =>
    _firebaseMethods.fetchAllUsers(user);

From the FirebaseMethods class

  Stream<DocumentSnapshot> getUserStream({@required String uid}) =>
      _userCollection.doc(uid).snapshots();

   Future<List<User>> fetchAllUsers(User currentUser) async {
    List<User> userList = List<User>();

    QuerySnapshot querySnapshot =
        await firestore.collection(USERS_COLLECTION).get();
    for (var i = 0; i < querySnapshot.docs.length; i++) {
      if (querySnapshot.docs[i].id != currentUser.uid) {
        userList.add(user.User.fromMap(querySnapshot.docs[i].data));
      }
    }
    return userList;
  }