docs: def digester(data):
      """Create SHA-1 hash, get digest, b64 encode, split every 60 char."""
      if not isinstance(data, six.binary_type):
          data = data.encode('utf_8')
      hashof = hashlib.sha1(data).digest()
      encoded_hash = base64.b64encode(hashof)
      if not isinstance(encoded_hash, six.string_types):
          encoded_hash = encoded_hash.decode('utf_8')
      chunked = splitter(encoded_hash, chunksize=60)
      lines = '\n'.join(chunked)
      return lines