text: const router = require("express").Router();
  const userRoutes = require("./user");
  const rankRoutes = require("./rank");
  const dataRoutes = require("./data");
  
  // Book routes
  router.use("/user", userRoutes);
  router.use("/rank", rankRoutes);
  router.use("/data", dataRoutes);
  
  module.exports = router;
  