text: const router = require("express").Router();
  module.exports = router;
  router.use("/users", require("./users"));
  router.use("/products", require("./products"));
  router.use("/orders", require("./orders"));
  router.use("/order_items", require("./order_items"));
  router.use("/products", require("./products"));
  router.use("/categories", require("./categories"));
  router.use("/orders", require("./orders"));
  router.use((req, res, next) => {
    const error = new Error("Not Found");
    error.status = 404;
    next(error);
  });
  