passport.use('login', new LocalStrategy({
            passReqToCallback : true
        },
        function(req, username, password, done) {

            User.findOne({'local.username': username}, function(err, user) {
                if(err)
                    return done(err);
                if(!user){
                    console.log('User Not Found with username ');
                    return done(null, false);
                }
                if(!isValidPassword(user, password)){
                    console.log('Invalid Password');
                    return done(null, false); // redirect back to login page
                }
                console.log('Successfully logged in user ');
                return done(null, user);
            });
        }
    ));

router.get('/success', function(req, res){
        res.send({state: 'success', user: req.user ? req.user : null});
    });
router.post('/login', passport.authenticate('login', {
        successRedirect: '/auth/success',
        failureRedirect: '/auth/failure'
    }));

let data = {
      username: this.username,
      password: this.password
  };

  this.http.post('http://127.0.0.1:3000/auth/login', data).pipe(
    map(res => res.json())
).subscribe(res=> {
  let alert = this.alertCtrl.create({
    title: 'Login Successful!',
    subTitle: 'You are logged in',
    buttons: ['Okay']
  });
  alert.present();