code: def set_email(self, email, _vars=None, lists=None, templates=None, verified=0, optout=None, send=None, send_vars=None):
          
          _vars = _vars or {}
          lists = lists or []
          templates = templates or []
          send_vars = send_vars or []
          data = {'email': email,
                  'vars':  _vars.copy(),
                  'lists': lists,
                  'templates': templates,
                  'verified': int(verified)}
          if optout is not None:
              data['optout'] = optout
          if send is not None:
              data['send'] = send
          if send_vars:
              data['send_vars'] = send_vars
          return self.api_post('email', data)
docs: DEPRECATED!
          Update information about one of your users, including adding and removing the user from lists.
          http://docs.sailthru.com/api/email