How to use the evasdk.eva_errors.EvaServerError function in evasdk

r_json = r.json()
        if 'error' in r_json:
            error_string += ' with error [{}]'.format(r_json)
    except ValueError:
        pass

    if r.status_code == 401:
        raise EvaValidationError(error_string)
    elif r.status_code == 401:
        raise EvaAuthError(error_string)
    elif r.status_code == 403:
        raise EvaAdminError(error_string)
    elif 400 <= r.status_code < 500:
        raise EvaError(error_string)
    elif 500 <= r.status_code < 600:
        raise EvaServerError(error_string)
    else:
        raise EvaError(error_string)