gistfile1.txt

// passport
passport.use(new LocalStrategy(
  function(username, password, next) {
    userService.findByUsername(username)
               .then(function(user) {
                 if (! user) {
                   return userService.save({
                     username: username,
                     password: password
                   });
                 }
                 if (! user.validPassword(password)) {
                   return next(new Error('Password not valid.'));
                 }
                 return user;
               })
               .then(function(user) {
                 next(null, user);
               })
               .catch(next);
    // userService.findByUsernamePassword(username, password)
    //            .then(function(user) {
    //              next(null, user);
    //            })
    //            .catch(next);
  }
));