apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/spi/configuration/AuthConfiguration.java/OidcAuthAutoConfiguration/oidcUserInfoHolder
class OidcAuthAutoConfiguration:    @Bean
    @ConditionalOnMissingBean(UserInfoHolder.class)
    public UserInfoHolder oidcUserInfoHolder(UserService userService) {
      return new OidcUserInfoHolder(userService);
    }