update registration

hi,
how to update the username in dynamic permissions page if the user name in kullanicilar table changes?

master table
kullanicilar ===>
UserName(PK,NN,UQ), kullanici_kodu(id)(PK,NN)

dynamic permission
esubeugmembers==>
UserName(Pk,NN,UQ), kullanici_kodu(id)(PK,NN)

my code:
kullanicilar table /edit/ UserName

event/ before record update

global $dal;
$tblesubeugmembers = $dal->Table("esubeugmembers");
$tblesubeugmembers->Value["UserName"] = $values["UserName"];
$tblesubeugmembers->Param["kullanici_kodu"] = $values["kullanici_kodu"];
$tblesubeugmembers->Update();

unset($values["UserName"]);

return true;

thank you.

https://xlinesoft.com/phprunner/docs/update_multiple_tables.htm
https://xlinesoft.com/phprunner/docs/update.htm