[Toni]

I suggest you use strcmp, over strfind.

It's quite easier.

pawn Код:

new pName[24];
GetPlayerName(playerid, pName, 24);
if(!strcmp(pName, "<Name>", true)) return SendClientMessage(playerid, 0xFFFFFFFF, "ERROR: You are not authorized to do this command!");
{
     //This means their name is correct and matching the specified name.
}
return 1;

Edit:

If you look at iggy's code it has the full command.