[Konstantinos]

This should work.

pawn Код:

CMD:osetcash(playerid,params[])
{
    if(!(PlayerInfo[playerid][pAdmin] >= 4)) return SCM(playerid, COLOR_LIGHTRED,"You are not authorized to use this command");
    new
        _name[ 24 ],
        _cash
    ;
    if(sscanf(params, "s[24]d", _name, _cash)) return SCM(playerid, COLOR_LIGHTRED,"Usage: /osetcash <Name> <Cash>");
    new
        string[ 32 ]
    ;
    format(string,sizeof(string),"Users/%s.ini",_name);
    if(fexist(string))
    {
        new INI:File = INI_Open(string);
        INI_SetTag(File,"data");
        INI_WriteInt(File,"Cash", _cash);
        INI_Close(File);
        // I don't really understand that message
    }
    else SendClientMessage(playerid,COLOR_YELLOW,"{FF0000}..::{FF6347}[Database]:Account not found{FF0000}::..");
    return 1;
}

The params will be <name cash>, there is no such a file with name cash.ini. What the message [Admin-Warning] should do, because I left it.