[ddnbb]

pawn Код:

new file[64], string[128];
GetPlayerName(playerid, pInfo[playerid][AccName], MAX_PLAYER_NAME);
format(file, sizeof(file), "/nxadmin/Accounts/%s.ini", pInfo[playerid][AccName]);
if (dini_Exists(file))
{
    print("Account exists");
}

Isnt that hard...