LocationPermission 에러

import 'package:flutter/material.dart';
import 'package:geolocator/geolocator.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';

class HomeScreen extends StatefulWidget {
  

  const HomeScreen({super.key});

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  final CameraPosition initialPosition = CameraPosition(
    target: LatLng(37.5214, 126.9246),
    zoom: 17
    );


    @override
    initState(){
      super.initState();

      checkPermission();
    }

    checkPermission( ) async {
      final inLocationEnabled = await Geolocator.isLocationServiceEnabled();

      if(!inLocationEnabled){
        throw Exception('위치 기능을 활성화 해주세요');
      }

      LocationPermission checkedPermission = await Geolocator.checkPermission();

      if(checkedPermission == LocationPermission.denied){
        checkedPermission = await Geolocator.requestPermission();
      }

      if(checkedPermission != LocationPermission.whileInUse || checkedPermission != LocationPermission.always) {
        throw Exception('권한을 허가해 주세요');
      }
    }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Column(
        children: [
          Expanded(
            child: GoogleMap(
              initialCameraPosition: initialPosition,
              )
          )
        ],
      ),
    );
  }
}

강의를 보면서 공부 도중 테스트를 하는데

LocationPermission.whileInUse

LocationPermisson.always 의 if문에서 Exception으로 던지는데 해결방법을 모르겠습니다.