AuthMiddleware.js

var express = require('express');
var User = require('../models/User');

// route middleware to verify a token
var auth = function(req, res, next) {
      // check header or url parameters or post parameters for token
      // decode token
      var token = req.body.accessToken || req.headers['x-access-token'];

      if (token) {
        //verify if user exists with toekn
      	User.findOne({ accessToken: token }, function(err, user) {
      		req.user = user;
        	next();
      	});

      } else {
        // if there is no token
        // return an error
        return res.status(403).send({
            success: false,
            message: 'No token provided.'
        });
      }
  }

};

module.exports = auth;