PhysiGo/app/lib/database.dart

import 'package:cloud_firestore/cloud_firestore.dart';

class DatabaseManager {
  CollectionReference usersList =
      FirebaseFirestore.instance.collection("Users");


  Future getUsersList() async {
    List users = [];
    try {
      await usersList.orderBy("total_points", descending: true).get().then((querySnapshot){
        querySnapshot.docs.forEach((element){
        users.add(element.data());
        });
      });

      return users;
    } catch(e){
      print(e.toString());
      return null;
    }
  }
}