Create an auth.js middleware

Question

I have created an auth.js middleware with fastify and prisma but I don't know how to insert it in my route. Here are some examples

const jwt = require("jsonwebtoken");
require("dotenv").config();

module.exports = (request, reply) => {
  try {
    const token = request.headers.authorization.split(" ")[1];
    const decodedToken = jwt.verify(token, process.env.SECRET_TOKEN);
    request.token = decodedToken;
  } catch (error) {
    reply.status(401).send({
      message: "Vous êtes pas authentifié",
    });
  }
};
const profilCtrl = require("../../controller/user");

const auth = require("../../middleware/auth");
async function routes(fastify) {
  fastify.get("/profil/:id", profilCtrl.profile);
}

module.exports = routes;