[Nero_3D]

To your first question, here a better way

pawn Код:

#define RCON_PASSWORD "password"

pawn Код:

SendRconCommand("rcon_password " RCON_PASSWORD);

And to your second question, the same as you already posted

pawn Код:

if(strfind(text, RCON_PASSWORD, true) != -1)
        return !SendClientMessage(playerid, COLOR_RED, "DUMMY you almost said the rcon pass");