[Skribblez]

I have no idea on what you're asking about creating or deleting objects. Anyway, you might want to use ****** or simply browse through the tutorials section of the forums for a registration and log-in system using dialogues.

Here's a few that I found:
https://sampforum.blast.hk/showthread.php?tid=167937
https://sampforum.blast.hk/showthread.php?tid=290320
https://sampforum.blast.hk/showthread.php?tid=273088

There are a lot, all you need to do is search. Most importantly, try learning how to script - https://sampwiki.blast.hk/