Spring Security:如何更改默认用户和密码？

@Service
public class CustomUserDetailsService implements UserDetailsService {

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        // 在这里根据用户名加载用户信息，并返回一个实现了 UserDetails 接口的对象
        // 可以从数据库、LDAP、内存等来源获取用户信息
        // 如果用户不存在，可以抛出 UsernameNotFoundException 异常
    }
}

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private UserDetailsService userDetailsService;

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService);
    }

    // 其他配置...
}

@Service
public class CustomUserDetailsService implements UserDetailsService {

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        if ("admin".equals(username)) {
            // 创建一个具有自定义用户名、密码和角色的用户对象
            return User.builder()
                    .username("admin")
                    .password("{bcrypt}$2a$10$P6U9fX5QzWf7JXV0L7q1AeI0y8I4R4X6qQyj5fQKl7Hs3X3F3gV9K")
                    .roles("ADMIN")
                    .build();
        } else {
            throw new UsernameNotFoundException("User not found");
        }
    }
}