JSON Get data from API - POST Request - Swift 3

// Vladimir Zhelnov - neatek.pw - Web/iOS dev
class Class_JSONRequest {
    func get_url_post(get_url: String, params: String, completion: @escaping (_ result: NSDictionary) -> Void) {
        let myUrl = URL(string: get_url);
        var request = URLRequest(url:myUrl!)
        request.httpMethod = "POST"
        let postString = params;
        request.httpBody = postString.data(using: String.Encoding.utf8);
        let task = URLSession.shared.dataTask(with: request) { (data: Data?, response: URLResponse?, error: Error?) in
            if error != nil
            {
                print("error=\(error)")
                return
            }
            do {
                if(data != nil) {
                    let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
                    if let parseJSON = json {
                        //print(parseJSON)
                        completion(parseJSON)
                    }
                }
            } catch {
                print(error)
            }
        }
        task.resume()
    }
}
/* usage:
let post_params = "some=post&params=1";
JSON.get_url_post(get_url: "http://..api", params: post_params , completion: { answer in
    ... something
});
*/