인프런 커뮤니티 질문&답변

authenticationManager 빈을 하나 생성하셔서 사용하시면 될 것 같습니다.

@Bean
	AuthenticationManager authenticationManager(AuthenticationConfiguration authConfiguration) throws Exception {
		return authConfiguration.getAuthenticationManager();
	}

@Bean
	public SecurityFilterChain configure(HttpSecurity http) throws Exception {
    AuthenticationManager authenticationManager = authenticationManager(http.getSharedObject(AuthenticationConfiguration.class));    
    http.~~~
     .addFilter(getAuthenticationFilter(authenticationManager));
    return http.build();
}

private AuthenticationFilter getAuthenticationFilter(AuthenticationManager authenticationManager) {
		AuthenticationFilter authenticationFilter = new AuthenticationFilter(authenticationManager);
		return authenticationFilter;
	}

또는

@Bean
	public SecurityFilterChain configure(HttpSecurity http) throws Exception {
    
    http.~~~
     .addFilter(getAuthenticationFilter(http));
    return http.build();
}

private AuthenticationFilter getAuthenticationFilter(HttpSecurity http) {
		AuthenticationFilter authenticationFilter = new AuthenticationFilter(http.getSharedObject(AuthenticationConfiguration.class));
		return authenticationFilter;
	}

이렇게 추가하시고

AuthenticationFilter에서는

@RequiredArgsConstructor
public class AuthenticationFilter extends UsernamePasswordAuthenticationFilter{

	private final AuthenticationManager authenticationManager;

      //attemptAuthentication

      //successAuthentication
}

이렇게 적용해보시면 될 듯합니다.