saveCredential

          var collectionReference = FirebaseFirestore.instance.collection('users');
          var query = collectionReference.where('id', isEqualTo: firebaseAuth.currentUser!.uid );
          var querySnapshot = await query.get();

          if (querySnapshot.docs.isNotEmpty) {
            // Access the first document (you may need to loop through if you expect multiple matches)
            var doc = querySnapshot.docs[0].data();

            String bio = doc['bio'];
            String country = doc['country'];
            String email = doc['email'];
            String gender = doc['gender'];
            String id = doc['id'];
            bool isOnline = doc['isOnline'];
            Timestamp lastSeen = doc['lastSeen'];
            String photoUrl = doc['photoUrl'];
            String userName = doc['username'];
            Timestamp time =  doc['time'];


            User curUser = new  User.Complete(userName,email,country,bio,gender,photoUrl,id,lastSeen,isOnline,time);

            print(curUser.email);
          } else {
            print('No matching documents found.');
          }