nodejs-express-jwt.js

var jwt = require('express-jwt');
var JwtTokenValidator = {
  validateToken: function(req, res, next) {
    if(req.user) {
      next();
    } else {
      res.status(401).json({ error: 'JwtMissingOrIncorrect', message: 'JWT token is missing or incorrect.' });
    }
  }
}

app.use(jwt({ secret: process.env.AUTH0_CLIENT_SECRET, iss: process.env.AUTH0_ISS }),
  function(req, res, next) {
    JwtTokenValidator.validateToken(req, res, next);
});