code: def _handle_response(response):
          
          if not response.ok:
              raise NeverBounceAPIError(response)
          if response.headers.get('Content-Type') == 'application/octet-stream':
              return response.iter_lines()
  
          try:
              resp = response.json()
          except ValueError:
               raise InvalidResponseError('Failed to handle the response content-type {}.'.format(
                   response.headers.get('Content-Type'))
               )
          if 'success' in resp and not resp['success']:
              if 'msg' in resp and resp['msg'] == 'Authentication failed':
                  raise AccessTokenExpired
              else:
                  raise NeverBounceAPIError(response)
          return resp
docs: Handle the response and possible failures.
          :param Response response: Response data.
          :return: A dictionary or a string with response data.
          :raises: NeverBounceAPIError if the API call fails.