code: def author_info(name, contact=None, public_key=None):
      
      return Storage(name=name, contact=contact, public_key=public_key)
docs: Easy object-oriented representation of contributor info.
  
      :param str name: The contributor´s name.
      :param str contact: The contributor´s email address or contact
                          information, if given.
      :param str public_key: The contributor´s public keyid, if given.