@Bean
    public AuthDataSubscriber signAuthDataSubscriber() {
        return new SignAuthDataSubscriber();
    }
Sign auth data subscriber.

@return the auth data subscriber
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