Created the session controller

server/controller/session.js

@@ -0,0 +1,10 @@
+const jwt = require('jsonwebtoken');
+const {getToken} = require("./token");
+
+module.exports.validateSession = async (jwtToken) => {
+    try {
+        return jwt.verify(jwtToken, getToken());
+    } catch (e) {
+        return null;
+    }
+}