Update config variables and add nodemailer's ones

middlewares/authenticate.js

@@ -1,11 +1,11 @@
 const jwt = require('jsonwebtoken');
-const { jwt_secret } = require('../config/config');
+const { jwtSecret } = require('../config/config');
 
 function authenticate(req, res, next) {
 	const token = req.get('Authorization');
 
 	if (token) {
-		jwt.verify(token, jwt_secret, (err, decoded) => {
+		jwt.verify(token, jwtSecret, (err, decoded) => {
 			if (err) return res.status(401).json(err);
 			req.decoded = decoded;
 			next();