/**
* Check if user with given login exists
*
* @param string $login
* @param integer $cacheMinutes
* @throws InvalidArgumentException
* @return boolean
*/
public function isLoginExists($login, $cacheMinutes = 0, $cacheTag = null)
{
if (empty($login)) {
throw new InvalidArgumentException("\$login have to be non empty string");
}
$filter = new UsersFilter();
$filter->setLogin($login);
$usersCount = $this->getUsersListCount($filter, $cacheMinutes, $cacheTag);
if ($usersCount > 0) {
return true;
}
return false;
}
