bluebirdExample.js

const models = require('../../loading/loading');
const Promise = require('bluebird');

 module.exports = Promise.method(function userExists(userAttributes) {

	return models.User
				.findOne({
		  			where: {
		  				email: userAttributes.email
		  			}
		  		}).then((user) => {
		    		if (!user) return false;
		    		return user;
		  		}).catch((error) => {
		    		console.log(error);
		    		throw error;
		  		});

});