Toast.makeText(getApplicationContext(), "" + URL, Toast.LENGTH_SHORT).show();

    RequestQueue queue = Volley.newRequestQueue(this);
    JsonRequest JsonObjectRequest = new JsonObjectRequest(Request.Method.GET, URL, new Response.Listener<JSONObject>() {

        @Override
        public void onResponse(JSONObject response) {

           Cliente cliente = new Cliente();
            Toast.makeText(getApplicationContext(), "Se ha encontrado el usuario", Toast.LENGTH_SHORT).show();

            JSONArray jsonArray = response.optJSONArray("datos");
            JSONObject jsonObject = null;

            try {

                jsonObject = jsonArray.getJSONObject(0);
                cliente.setNombre(jsonObject.optString("nombre"));
                cliente.setApellido(jsonObject.optString("apellido"));
                cliente.setRut(jsonObject.optString("rut"));
                cliente.setId(jsonObject.optString("id"));

            } catch (JSONException e) {

                e.printStackTrace();

            }



        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {

        }
    });

    queue.add(JsonObjectRequest);

}