code: def login(self, token, use_token=True, mount_point=DEFAULT_MOUNT_POINT):
          
          params = {
              'token': token,
          }
          api_path = '/v1/auth/{mount_point}/login'.format(mount_point=mount_point)
          return self._adapter.login(
              url=api_path,
              use_token=use_token,
              json=params,
          )
docs: Login using GitHub access token.
  
          Supported methods:
              POST: /auth/{mount_point}/login. Produces: 200 application/json
  
  
          :param token: GitHub personal API token.
          :type token: str | unicode
          :param use_token: if True, uses the token in the response received from the auth request to set the "token"
              attribute on the the :py:meth:`hvac.adapters.Adapter` instance under the _adapater Client attribute.
          :type use_token: bool
          :param mount_point: The "path" the method/backend was mounted on.
          :type mount_point: str | unicode
          :return: The JSON response of the login request.
          :rtype: dict