code: func (c *Client) Post(fmr *FullRequest, resp interface{}, options ...RequestOptions) (err error) {
  	url := buildURL(c.apiBase, fmr.Info)
  	req, err := createRequest("POST", url, fmr.Payload, nil, options...)
  	if err != nil {
  		return err
  	}
  
  	headers := map[string]string{"Content-Type": "application/json"}
  	c.Lock()
  	defer c.Unlock()
  	_, _, err = c.httpClient.Send(req).With(headers).Read(resp).Call()
  	return err
  }
docs: // Post issues a POST to create a new resource
  // and stores the result in the value pointed to by res.
  // Filters can be add via functional options.