您可以使用shopify API addHandlers方法添加和处理webhook。例如，使用node.js，您可以创建以下内容：

webhooks/app-uninstall.js

import { DeliveryMethod } from "@shopify/shopify-api";
// Configured from the shopify app node.js boilerplate
import shopify from "../shopify";

async function addUninstallWebhookHandler() {
  return await shopify.api.webhooks.addHandlers({
    APP_UNINSTALLED: {
      deliveryMethod: DeliveryMethod.Http,
      callbackUrl: "/api/webhooks/app-uninstall",
      callback: async (topic, shop) => {
        console.log("Uninstall app webhook invoked", topic, shop);
        // Invoke analytics, database query etc.
      },
    },
  });
}
export default addUninstallWebhookHandler;

在您的express应用中调用此函数
要测试此webhook，请触发此命令npm run shopify webhook trigger并选择app/uninstalled