created(auth) auth middleware has been added and used on person route

middleware/auth.js

@@ -0,0 +1,13 @@
+const jwt = require("jsonwebtoken");
+
+module.exports = function auth(req, res, next) {
+  const token = req.header("x-auth-token");
+  if (!token) return res.status(401).send("Access denied! No token provided.");
+
+  try {
+    jwt.verify(token, process.env.rememberMe_jwtKey);
+    next();
+  } catch (ex) {
+    return res.status(400).send("Invalid token.");
+  }
+};