DictionaryManager::getUser

static function getUser($userId)
{
	return static::$userBefore = BitrixMainUserTable::getList([
		'select' => ['ID', 'UF_DEPARTMENT'],
		'filter' => [
			'=ID' => $userId,
			'!=EXTERNAL_AUTH_ID' => BitrixMainUserTable::getExternalUserTypes(),
		],
		'limit' => 1,
	])->fetchObject();
}