code: func New(client Client, auth api.AuthConfig) Docker {
  	return &stiDocker{
  		client: client,
  		pullAuth: dockertypes.AuthConfig{
  			Username:      auth.Username,
  			Password:      auth.Password,
  			Email:         auth.Email,
  			ServerAddress: auth.ServerAddress,
  		},
  	}
  }
docs: // New creates a new implementation of the STI Docker interface