Twilio Plugin - Keeping a user logged in

Future loginUser(String phone, String password,
      TextEditingController codeController) async {
    String result = 'OK';
    FocusManager.instance.primaryFocus?.unfocus();
    _showUserProgress = true;
    _userProgressText = 'Busy logging you in...please wait...';
    notifyListeners();
    phone = phone.replaceRange(0, 1, '+27');
    print(phone);
    Twilio.loginWithPhoneNumberAndPassword(phone, password).then((value) async {
      String transactionId = value["transactionId"];
      String? code = await showVerificationDialog(codeController);
      if (code != null && code.compareTo('CANCEL') != 0) {
        Twilio.loginWithCode(transactionId, code).then((value) {
          if (value != null) {
            print(value);
            _currentUser = BackendlessUser.fromJson(value);
            //Backendless.userService.setCurrentUser(_currentUser!);
            print(value['user-token']);
            Backendless.userService.setUserToken(value['user-token']);
          }
          _showUserProgress = false;
          notifyListeners();
          Get.off(() => const HomeAdmin());
          showSnackBar(
              title: 'User Authentication',
              message:
                  '${_currentUser == null ? 'User' : _currentUser!.email} successfully authenticated!');
        }).onError((error, stackTrace) {
          print(getHumanReadableError(error.toString()));
          showSnackBar(title: 'User Authentication', message: error.toString());
          _showUserProgress = false;
          notifyListeners();
        });
      } else {
        showSnackBar(
            title: 'Authenticate User',
            message: 'Sorry, could not verify your phone number.');
        _showUserProgress = false;
        notifyListeners();
      }
    }).onError((error, stackTrace) {
      print(getHumanReadableError(error.toString()));
      showSnackBar(title: 'Here Authenticate User', message: error.toString());
      _showUserProgress = false;
      notifyListeners();
    });
  }

My login function. Like I said, login works perfectly, but the User does not stay logged in when using the normal Flutter SDK to check.