Change value in try c#

Question

I have a function which sends a Vector3 pos to a robot via RestSharp and the response of the POST call looks like this:

• {present_effector_pos: true/false}

I want to parse the true or false and return it as boolean.

public bool postEffectroPos(Vector3 pos, float speed_n)
    {
        var client = new RestClient("http://"+robotIP);
        var request = new RestRequest("/present/effector_position_with_speed.json", Method.POST) { RequestFormat = RestSharp.DataFormat.Json };
        effectorPos a = new effectorPos();
        a.x = pos.x;
        a.y = pos.z;
        a.z = pos.y;
        a.speed = speed_n;
        request.AddBody(a);
        bool move = false;
        try
        {
            client.ExecuteAsync(request, response =>
                {
                    if (response.StatusCode == HttpStatusCode.OK)
                    {
                        string[] tmp = response.Content.Split(':');
                        string t = tmp[1].Remove(tmp[1].Length - 1);
                        move = bool.Parse(t);
                        Debug.Log(move);
                    }
                    else
                    {
                        Debug.Log(response.StatusCode);
                    }
                });
        }
        catch (Exception error)
        {
            Debug.Log(error);
        }
        return move;
    }

But no matter to what value the variable move is changed in the if clause through parsing the method always returns false.