A classy ES6 example: "Do it NOW!" - Shia

services.user.js

// services/user.js
function Users(data) {
  // ensure we're a real thing
  if (!(this instanceof Users)) { return new Users(data); }
  this.users = data || [];
}

Users.prototype.add = function(opts) {
    // Validate input, We need to extract the 3 fields from opts
    if ( !opts || typeof(opts) !== 'object' ) {
      return Promise.reject('add() requires Opts parameter');
    }
    // Unpack data, assuming keys are there 
    var name  = opts.name,
        email = opts.email,
        pass  = opts.password;
    var hash = getSha256(pass);
    
    return http.post('/users', {
      'name': name,
      'email': email,
      'passwordHash': hash})
    .then(function(usr) {
      return this.users.push(usr);
    });
  }
}