>>It is possible to
>>create user account with sql script from Delphi?
>>
>>Kr152ta

As far as I know you can use ShellExecuteEx with gsec with following
parameters:
gsec -database dbhost:/path/to/securtiy.fdb -user sysdba -password
masterkey -add aladin -pw sesame

Best regards / Liebe Grüße aus einem sonnigen Wien
André