[Pharrel]

pawn Code:

CMD:makeadmin(playerid, params[]){
    if(PlayerInfo[playerid][pAdmin] < 1) return SendClientMessage(playerid,COLOR_GRAY,"ERROR: You're not authorized to use this command!");
    new id, lvl;
    if(sscanf(params, "ui", id, lvl)) return SendClientMessage(playerid, COLOR_WHITE, "SYNTAX: /makeadmin [PlayerID/PartOfName] [Level]");
    else if(!IsPlayerConnected(id)) return SendClientMessage(playerid, COLOR_WHITE, "Invalid ID");
    else
    {
     PlayerInfo[playerid][pAdmin] = lvl;
    }
    return 1;
}

Try like this