code: def create_key(self, title, key):
          
          json = None
          if title and key:
              data = {'title': title, 'key': key}
              url = self._build_url('keys', base_url=self._api)
              json = self._json(self._post(url, data=data), 201)
          return Key(json, self) if json else None
docs: Create a deploy key.
  
          :param str title: (required), title of key
          :param str key: (required), key text
          :returns: :class:`Key <github3.users.Key>` if successful, else None