CustomerController.js

    // find the existing customer or create a new one
    Customer.findOrCreate({email: customer.email}, customer).exec(function (err, customerFound) {

      if (err) {
        sails.log(vehicle.vrm + ': error finding or creating customer');
        sails.log(err);
        return res.serverError(500);
      }
      else {
        sails.log(vehicle.vrm + ": customer ID " + customerFound.id);
      }

    });