How can I use OnlineMapsFindDirection -> waypoint

    public float placeLatitude2GO, placeLongitude2GO;
    float placeLatitude1, placeLongitude1;



    string[] waypoints = { "Waypoint 1", "Waypoint 2", "Waypoint 3" };
    List<Vector2> waypoints2 = new List<Vector2>
{
    new Vector2(-7.911771f,38.555735f),
    new Vector2(-7.916875f,38.562577f),
    new Vector2(-7.902130f,38.565808f),

};



    public void MakeFeaturedRoutes()
    {
        //Remove todas as linhas que tinha antes para criar a nova route
        OnlineMaps.instance.RemoveAllDrawingElements();

        if (OnlineMapsLocationService.instance.IsLocationServiceRunning())
        {
            placeLatitude1 = OnlineMapsLocationService.instance.position.y;
            placeLongitude1 = OnlineMapsLocationService.instance.position.x;
            Debug.Log("[MakeFeaturedRoute.cs] Latitude: " + placeLatitude1 + " e Longitude: " + placeLongitude1);



            OnlineMapsGoogleDirections query = OnlineMapsGoogleDirections.Find(new OnlineMapsGoogleDirections.Params(new Vector2(placeLongitude1, placeLatitude1), new Vector2(placeLongitude2GO, placeLatitude2GO))
            {
                //mode = OnlineMapsGoogleDirections.Mode.walking, //Mode de ir a pé

                waypoints = waypoints
            });

            // Specifies that search results must be sent to OnFindDirectionComplete.
            query.OnComplete += OnFindDirectionComplete;

        }
       
    }


    private void OnFindDirectionComplete(string response)
    {
        // Get the resut object.
        OnlineMapsGoogleDirectionsResult result = OnlineMapsGoogleDirections.GetResult(response);

        // Check that the result is not null, and the number of routes is not zero.
        if (result == null || result.routes.Length == 0)
        {
            Debug.Log("Find direction failed");
            Debug.Log(response);
            return;
        }

        // Showing the console instructions for each step.
        foreach (OnlineMapsGoogleDirectionsResult.Leg leg in result.routes[0].legs)
        {
            foreach (OnlineMapsGoogleDirectionsResult.Step step in leg.steps)
            {
                Debug.Log(step.string_instructions);
            }
        }

        // Create a line, on the basis of points of the route.
        OnlineMapsDrawingLine route = new OnlineMapsDrawingLine(result.routes[0].overview_polyline, Color.green);

        // Draw the line route on the map.
        OnlineMaps.instance.AddDrawingElement(route);

    }

<?xml version="1.0" encoding="UTF-8"?>
<DirectionsResponse>
<status>ZERO_RESULTS</status>
</DirectionsResponse>