[Solved] how to get the id of inserted row

hi there, I am doing insert statement in DB like
$this->Database->prepare("INSERT INTO " . $table . " %s")->set($arrSet)->execute();
How can I get the Id of inserted row? Thanks

EDIT:
$ins = $this->Database->prepare("INSERT INTO " . $table . " %s")->set($arrSet)->execute();
$ins->insertID;