improve error handling (pass on response body to client)

                    s.onNext((T) performRequest(type, request));

                    s.onComplete();

                } catch (Exception e) {

                    e.printStackTrace();

                    s.onError(e);

                }

            }

public class NextcloudHttpRequestFailedException extends SSOException {

    private int statusCode;

    private Throwable cause;

    public NextcloudHttpRequestFailedException(int statusCode) {

    public NextcloudHttpRequestFailedException(int statusCode, Throwable cause) {

        this.statusCode = statusCode;

        this.cause = cause;

    }

    @Override

    public int getStatusCode() {

        return statusCode;

    }

    @Override

    public synchronized Throwable getCause() {

        return cause;

    }

}

                return new NextcloudInvalidRequestUrlException(exception.getCause().getMessage());

            case Constants.EXCEPTION_HTTP_REQUEST_FAILED:

                int statusCode = Integer.parseInt(exception.getCause().getMessage());

                return new NextcloudHttpRequestFailedException(statusCode);

                Throwable cause = exception.getCause().getCause();

                return new NextcloudHttpRequestFailedException(statusCode, cause);

            case Constants.EXCEPTION_ACCOUNT_ACCESS_DECLINED:

                return new NextcloudFilesAppAccountPermissionNotGrantedException();

            default: