code: func (c *Client) GetClusterConfig(opts ...services.MarshalOption) (services.ClusterConfig, error) {
  	out, err := c.Get(c.Endpoint("configuration"), url.Values{})
  	if err != nil {
  		return nil, trace.Wrap(err)
  	}
  
  	cc, err := services.GetClusterConfigMarshaler().Unmarshal(out.Bytes(), services.SkipValidation())
  	if err != nil {
  		return nil, trace.Wrap(err)
  	}
  
  	return cc, err
  }
docs: // GetClusterConfig returns cluster level configuration information.