invitation.js

const InvitationHelper = require('../InvitationHelpers');

self.customCreate = (data, fn) => {
    return findUser()
      .then(InvitationHelpers.checkParams)
      .then(InvitationHelpers.checkIsInSP)
      .then(InvitationHelpers.checkIsInvited)
      .then(InvitationHelpers.createInvitation)
      .then(InvitationHelpers.queueEmail)
      .then((invitation) => {
        fn(null, invitation);
      })
      .catch(fn);
  };