private VerifyResult signVerifyWithBody(final String originalBody, final ServerWebExchange exchange) {
        // get url params
        return signService.signatureVerify(exchange, originalBody);
    }
Instantiates a new Sign plugin.

@param readers     the sign use readers
@param signService the sign service
shenyu-plugin/shenyu-plugin-security/shenyu-plugin-sign/src/main/java/org/apache/shenyu/plugin/sign/SignPlugin.java