[Sawalha]

You need to use OnDialogResponse, called when a dialog is being responsed.

pawn Код:

public OnPlayerDialogResponse(playerid, dialogid, listitem, inputtext[], response)

Put the dialog's ID,
check if he responsed
check if password was correct,
Use as they told you up ^

pawn Код:

SpawnPlayer(playerid)

And onplayerspawn as ILOVEPAWN told you