if ( response.ResponseStatus == ResponseStatus.Completed ) {
                Console.WriteLine ("------");
                Console.WriteLine (response.Content);
                Console.WriteLine (response.Data);
                Console.WriteLine ("------");
                return response.Data;
            }
            else { //errore di comunicazione col server
                ResponseResult parserError = new ResponseResult();
                if ( response.Content == "" )
                    parserError.Status = ResponseResult.RESPONDSTATUS.RS_CONNECTION_ERROR;
                else
                    parserError.Status = ResponseResult.RESPONDSTATUS.RS_INPUT_ERROR;

                Console.WriteLine ("------");
                Console.WriteLine ("[SignUp Rest Error] " + response.ErrorMessage);
                Console.WriteLine ("[Content] : " + response.Content);
                Console.WriteLine ("------");
                return parserError;
            }