Authentication 클래스 getPrincipal

네 확인해보고 있는데 잘 못 찾겠습니다
죄송하지만, MyUserDetailsService 파일, SecurityConfig 파일 메일로 부탁드리겠습니다.

MyUserDetailsService

 package com.daehan.shop.member;

import lombok.RequiredArgsConstructor;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;

@RequiredArgsConstructor
//DB에 있던 유저 정보 꺼내기
@Service
public class MyUserDetailsService implements UserDetailsService {

    private final MemberRepository memberRepository;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
//        DB에서 username을 가진 유저를 찾아와서
//        return new User(유저아이디, 비번, 권한) 해주세요
        var result = memberRepository.findByUsername(username);
        if (result.isEmpty()) {
            throw new UsernameNotFoundException("그런 아이디 없음");
        }
        var user = result.get();
        //System.out.println(user);
        List<GrantedAuthority> authorities = new ArrayList<>();
        authorities.add(new SimpleGrantedAuthority("일반유저"));
        var a = new CustomUser(user.getUsername(), user.getPassword(), authorities);
        a.displayName = user.getDisplayName();
        return a;
    }
}

***********************************************
SecurityConfig

 package com.daehan.shop;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;

@Configuration
@EnableWebSecurity
public class SecurityConfig {

    @Bean
    PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
        http.csrf((csrf) -> csrf.disable());
        http.authorizeHttpRequests((authorize) ->
                authorize.requestMatchers("/**").permitAll()
        );

        //나는 form으로 로그인하겠다
        http.formLogin((formLogin) -> formLogin.loginPage("/login")
                .defaultSuccessUrl("/") //로그인성공
//                .failureUrl("/fail")
        );

        http.logout(logout -> logout.logoutUrl("/logout"));

        return http.build();
    }
}

CustomUser 클래스입니다.

package com.daehan.shop.member;

import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.userdetails.User;

import java.util.Collection;

public class CustomUser extends User {
    public String displayName;
    public CustomUser(String username,
                      String password,
                      Collection<? extends GrantedAuthority> authorities) {
        //복사한 User클래스
        super(username, password, authorities);
    }
//    public CustomUser(String username,
//                      String password,
//                      List<GrantedAuthority> authorities) {
//        super(username, password, authorities);
//    }
}

네 하였습니다.
에러 메시지가 getPrincipal()이 정의 되지 않았다는 에러인듯한데,
버전이 안 맞아서 이럴수가 있을까요?

ㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡ

java: cannot find symbol
  symbol:   method getPrincipal()
  location: variable auth of type org.apache.tomcat.util.net.openssl.ciphers.Authentication

ㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡ

package org.apache.tomcat.util.net.openssl.ciphers;

public enum Authentication {
    RSA    /* RSA auth */,
    DSS    /* DSS auth */,
    aNULL  /* no auth (i.e. use ADH or AECDH) */,
    DH     /* Fixed DH auth (kDHd or kDHr) */,
    ECDH   /* Fixed ECDH auth (kECDHe or kECDHr) */,
    KRB5   /* KRB5 auth */,
    ECDSA  /* ECDSA auth*/,
    PSK    /* PSK auth */,
    GOST94 /* GOST R 34.10-94 signature auth */,
    GOST01 /* GOST R 34.10-2001 */,
    FZA    /* Fortezza */,
    SRP    /* Secure Remote Password */,
    ANY    /* TLS 1.3 */
}