GameController.js

'submitResult': function () {

    var playDetails = req.params.all().play;
    var userDetails = req.params.all().user;

    var user, play;

    Play.find({id: playDetails.id})
    .then(function (playResult) {
      play = playResult;
      return UserService.createOrFindByParams(userDetails, play);
    })
    .then(function (userResult) {
      user = userResult;
      return UserService.alreadyPlayed(user);
    })
    .then(function (alreadyPlayed) {
      if(alreadyPlayed){
        return res.send({message: 'You have already played'});
      }
      else if(play == 'win'){
        PlayService.claimPrize(user).then(function () {
          return res.json({message: 'Your prize has been claimed'});
        });
      }
      else{
        return res.json({message: 'You lost sucker!'});
      }
    })
    .catch(function (error) {
      return res.send(500, error);
    });
  }
};