if(isset($update["message"]["from"]["username"])) $nickname = mysqli_real_escape_string($conn, $update["message"]["from"]["username"]);
                        else $nickname = mysqli_real_escape_string($conn, $update["message"]["from"]["first_name"]);
                        $query = mysqli_query($conn, "INSERT INTO Risposto (id, nickname) VALUES ($chatId,\"$nickname\")");
                        if($query != FALSE){
                        	$message = "Corretto!";
                        }else{
                        	$message = "Errore interno del bot";
                        }