protected function _getAuthFieldsList($field = null) {
		$authGroups = $this->_modelConfigSettingsApp->getAuthGroups();
		$result = [];
		if (empty($field)) {
			return $result;
		}

		foreach ($authGroups as $userRole => $authInfo) {
			if (!isset($authInfo[$field]) || empty($authInfo[$field])) {
				continue;
			}

			$result[$userRole] = $authInfo[$field];
		}

		return $result;
	}