[@Sakura]

How do I Dialog login with

[park4bmx]

doesnt make any sense

[Sascha]

like that:
when the player connects:

pawn Код:

ShowPlayerDialog(playerid, dialogid, DIALOG_STYLE_INPUT, "heading", "text", "OK", "Cancel");

and ondialogresponse

pawn Код:

if(dialogid == yourid)
{
  if(response == 1)
  {
    if(!strcmp(inputtext, actualpassword, true))
    {
      Log In
    }
  }
}

before trying yourself on a login system, learn the basics of dialogs and scripting^^