AsyncHttpClient method of JsonHttpResponseHandler not overridden from superclass?

Question

Android

private static AsyncHttpClient client = new AsyncHttpClient();
RequestParams params = new RequestParams();
params.put("login", login);
params.put("password", password);
client.post(postUrl, params, new JsonHttpResponseHandler());
You need to get a response from the server. The type of incoming and outgoing JSON data.
And I also need to add basic authorization, but I don’t understand how