我是spring security 6的新手。当我尝试配置安全性时，我得到了这个错误：

***************************
APPLICATION FAILED TO START
***************************

Description:

Parameter 2 of constructor in com.security.Security.service.impl.AuthenticationServiceImpl required a bean of type 'org.springframework.security.authentication.AuthenticationManager' that could not be found.

Action:

Consider defining a bean of type 'org.springframework.security.authentication.AuthenticationManager' in your configuration.

Process finished with exit code 1

字符串
我已经在配置文件中定义了bean，和方法来登录，注册。自从我添加了登录API，我得到了错误。
SecurityConfiguration类：

@Configuration
@EnableWebSecurity
@RequiredArgsConstructor
public class SecurityConfiguration{
    @Autowired
    public SecurityConfiguration(UserService userService, JWTAuthenticationFilter jwtAuthenticationFilter) {
        this.userService = userService;
        this.jwtAuthenticationFilter = jwtAuthenticationFilter;
    }
    private JWTAuthenticationFilter jwtAuthenticationFilter;
    private final UserService userService;

    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception{
        http.csrf(AbstractHttpConfigurer::disable)
                .authorizeHttpRequests(request -> request.requestMatchers("/api/v1/auth/**")
                        .permitAll()
                        .requestMatchers("/api/v1/admin").hasAnyAuthority(Role.ADMIN.name())
                        .requestMatchers("/api/v1/user").hasAnyAuthority(Role.USER.name())
                        .anyRequest().authenticated())
                .sessionManagement(manager -> manager.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
                .authenticationProvider(authenticationProvider()).addFilterBefore(
                        jwtAuthenticationFilter, UsernamePasswordAuthenticationFilter.class
                );
        return http.build();
    }
    @Bean
    public AuthenticationProvider authenticationProvider(){
        DaoAuthenticationProvider authenticationProvider = new DaoAuthenticationProvider();
        authenticationProvider.setUserDetailsService(userService.userDetailsService());
        authenticationProvider.setPasswordEncoder(passwordEncoder());
        return authenticationProvider;
    }
    @Bean
    protected PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }
    public AuthenticationManager authenticationManager(AuthenticationConfiguration config) throws Exception{
        return config.getAuthenticationManager();
    }
}

型
AuthenticationServiceImpl类：

@Service
@RequiredArgsConstructor
public class AuthenticationServiceImpl implements AuthenticationService {
    private final UserRepository userRepository;
    private final PasswordEncoder passwordEncoder;
    private final AuthenticationManager authenticationManager;
    private final JWTService jwtService;
    public User signup(SignUpRequest signUpRequest){
        User user = new User();
        user.setEmail(signUpRequest.getEmail());
        user.setName(signUpRequest.getName());
        user.setRole(Role.USER);
        user.setPassword(passwordEncoder.encode(signUpRequest.getPassword()));
        return userRepository.save(user);
    }
    public JwtAuthenticationResponse signin(SignInRequest signInRequest){
        authenticationManager.authenticate(new UsernamePasswordAuthenticationToken(signInRequest.getEmail(),signInRequest.getPassword()));
        var user = userRepository.findByEmail(signInRequest.getEmail()).orElseThrow(()-> new IllegalArgumentException("Invalid email or password"));
        var jwt = jwtService.generateToken(user);
        var refreshToken = jwtService.generatefreshToken(new HashMap<>(),user);
        JwtAuthenticationResponse jwtAuthenticationResponse = new JwtAuthenticationResponse();
        jwtAuthenticationResponse.setToken(jwt);
        jwtAuthenticationResponse.setRefreshToken(refreshToken);
        return jwtAuthenticationResponse;
    }
}

型
我怎样才能正确定义bean？我的代码中有什么错误？有人能解释一下中的参数吗？