Reorganize and improve error responses

middlewares/authMiddleware.js

@@ -0,0 +1,20 @@
+const jwt = require('jsonwebtoken');
+const { jwt_secret } = require('../config/config');
+
+function authenticate(req, res, next) {
+	const token = req.get('Authorization');
+
+	if (token) {
+		jwt.verify(token, jwt_secret, (err, decoded) => {
+			if (err) return res.status(401).json(err);
+			req.decoded = decoded;
+			next();
+		});
+	} else {
+		return res.status(401).json({
+			error: 'No token provided, must be set on the Authorization Header',
+		});
+	}
+}
+
+exports.authenticate = authenticate;