code: func (c *Client) SetClusterConfig(cc services.ClusterConfig) error {
  	data, err := services.GetClusterConfigMarshaler().Marshal(cc)
  	if err != nil {
  		return trace.Wrap(err)
  	}
  
  	_, err = c.PostJSON(c.Endpoint("configuration"), &setClusterConfigReq{ClusterConfig: data})
  	if err != nil {
  		return trace.Wrap(err)
  	}
  
  	return nil
  }
docs: // SetClusterConfig sets cluster level configuration information.