code: func (cli *Client) ConfigCreate(ctx context.Context, config swarm.ConfigSpec) (types.ConfigCreateResponse, error) {
  	var response types.ConfigCreateResponse
  	if err := cli.NewVersionError("1.30", "config create"); err != nil {
  		return response, err
  	}
  	resp, err := cli.post(ctx, "/configs/create", nil, config, nil)
  	defer ensureReaderClosed(resp)
  	if err != nil {
  		return response, err
  	}
  
  	err = json.NewDecoder(resp.body).Decode(&response)
  	return response, err
  }
docs: // ConfigCreate creates a new Config.