当我尝试在运行时注册新用户时，AuthenticationManagerBuilder的内存身份验证不起作用

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    
    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth.inMemoryAuthentication()
            .withUser("username")
            .password("password")
            .roles("USER");
    }
}

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    
    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        PasswordEncoder encoder = PasswordEncoderFactories.createDelegatingPasswordEncoder();
        
        auth.inMemoryAuthentication()
            .withUser("username")
            .password(encoder.encode("password"))
            .roles("USER");
    }
}

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
            .antMatchers("/register").permitAll()
            .anyRequest().authenticated()
            .and()
            .formLogin()
            .and()
            .httpBasic();
    }
}