code: public FessMessages addErrorsCouldNotDeleteLoggedInUser(String property) {
          assertPropertyNotNull(property);
          add(property, new UserMessage(ERRORS_could_not_delete_logged_in_user));
          return this;
      }
docs: Add the created action message for the key 'errors.could_not_delete_logged_in_user' with parameters.
  <pre>
  message: Could not delete logged in user.
  </pre>
  @param property The property name for the message. (NotNull)
  @return this. (NotNull)