code: function applyDefaultAccountFields(stormpathConfig, req) {
    var registerFields = stormpathConfig.web.register.form.fields;
  
    if ((!registerFields.givenName || !registerFields.givenName.required || !registerFields.givenName.enabled) && !req.body.givenName) {
      req.body.givenName = 'UNKNOWN';
    }
  
    if ((!registerFields.surname || !registerFields.surname.required || !registerFields.surname.enabled) && !req.body.surname) {
      req.body.surname = 'UNKNOWN';
    }
  }
docs: The Stormpath API requires the `givenName` and `surname` fields to be
  provided, but as a convenience our framework integrations allow you to
  omit this data and fill those fields with the string `UNKNOWN` - but only
  if the field is not explicitly required.
  
  @function
  
  @param {Object} stormpathConfig - The express-stormpath configuration object
  @param {Object} req - The http request.