code: func (c *Client) List(resource string, resp interface{}, options ...RequestOptions) (count, total int, err error) {
  	url := buildURL(c.apiBase, &Request{Resource: resource})
  	req, err := createRequest("GET", url, nil, nil, options...)
  	if err != nil {
  		return count, total, err
  	}
  
  	c.Lock()
  	defer c.Unlock()
  	return c.httpClient.Send(req).Read(resp).Call()
  }
docs: // List issues a GET to list the specified resource
  // and stores the result in the value pointed to by res.
  // Filters can be add via functional options.