[IceBilizard]

try this

pawn Код:

if(fexist(Path(playerid))) 
    {
        INI_ParseFile(Path(playerid),"loadaccount_user", .bExtra = true, .extra = playerid);
        ShowPlayerDialog(playerid,dlogin,DIALOG_STYLE_PASSWORD,"Login","Welcome back. This account is registered. \nInsert your password to login to your account","Login","Quit");
    }

EDIT:
Did you coping your code from here? https://sampforum.blast.hk/showthread.php?tid=359557
If you are coping then make sure you copied all correct code