code: func (c *Client) doRequest(host *URI, method, path string, headers map[string]string, reader io.Reader) (*http.Response, error) {
  	req, err := makeRequest(host, method, path, headers, reader)
  	if err != nil {
  		return nil, errors.Wrap(err, "building request")
  	}
  	return c.client.Do(req)
  }
docs: // doRequest creates and performs an http request.