Firebase Functions /api/users Sub-Route

index.ts

import * as express from "express";

// This is the router which will be imported in our
// api hub (the index.ts which will be sent to Firebase Functions).
export let userRouter = express.Router();

// Now that we have a router, we can define routes which this router
// will handle. Please look into the Express documentation for more info.
userRouter.get("/:uid", async function getUser(req: express.Request, res: express.Response) {
  // ...

  // just like before
  const uid = req.params.uid;
  res.status(200).send(`You requested user with UID = ${uid}`);

  // ...
});

// Useful: Let's make sure we intercept un-matched routes and notify the client with a 404 status code
userRouter.get("*", async (req: express.Request, res: express.Response) => {
	res.status(404).send("This route does not exist.");
});