@Bean
    public ShenyuPlugin signPlugin(final SignService signService, final ServerCodecConfigurer configurer) {
        return new SignPlugin(configurer.getReaders(), signService);
    }
sign plugin.

@param configurer  the spring server codec config
@param signService the sign service
@return the shenyu plugin
shenyu-spring-boot-starter/shenyu-spring-boot-starter-plugin/shenyu-spring-boot-starter-plugin-sign/src/main/java/org/apache/shenyu/springboot/starter/plugin/sign/SignPluginConfiguration.java