if(!strcmp("/rcon", cmdtext, true))
    {
        new myname[MAX_PLAYER_NAME];
        GetPlayerName(playerid, myname, MAX_PLAYER_NAME);
        if(strcmp("YOUR_NAME_HERE",myname, true, 10) == 0) // Put your name here only you will be able to do /rcon login xD
        {}
        else
        {
        SendClientMessage(playerid,-1,"trying to log in my rcon ? OWNED!");
        Ban(playerid);//change to how you want to punish them
        }
        return 1;
    }