Abridged express/app/controllers/users.js

users.js

const changepw = (req, res, next) => {
  debug('Changing password');
  let credentials = req.body.passwords;
  let search = {
                id: req.params.id,
                token: req.currentUser.token,
              };
  new User(search).fetch()
  .then((data) => {
    if (data) {
      data.comparePassword(req.body.passwords.old).then((fucker) => {
        delete fucker.passwordDigest;
        console.log('fucker: \n',fucker);
        new User(fucker).setPassword(credentials.new).save();//.then((thing)=> {console.log('this shit.....'); res.sendStatus(200)}); //thing, { patch: true }.save(this, {patch: true})
      });
    } else {
      Promise.reject(new HttpError(404));
    }
  })
  .then(console.log);
};