code: func Client() (*client.Client, error) {
  	server := os.Getenv("CAMLI_API_HOST")
  	if server == "" {
  		return nil, errors.New("CAMLI_API_HOST var not set")
  	}
  	am, err := basicAuth()
  	if err != nil {
  		return nil, err
  	}
  	return client.New(
  		client.OptionNoExternalConfig(),
  		client.OptionServer(server),
  		client.OptionAuthMode(am),
  	)
  }
docs: // Client returns a Perkeep client as defined by environment variables
  // automatically supplied by the Perkeep server host.