public static function getInstance($login = null, $password = null)
{
if (self::$instance === null) {
self::$instance = new static();
}
self::$instance->login = $login;
self::$instance->password = $password;
if (empty($login) || empty($password)) {
self::$instance->_getPlgRoistatSettings();
}
if (empty(self::$instance->project)) {
self::$instance->project = self::$instance->getProjectId();
}
return self::$instance;
}
