code: func load(filename string) (string, App, error) {
  	agentPB, err := loadAgentFile(filename)
  	return agentPB.GetUserAgent(), App{
  		ID:       agentPB.GetClientId(),
  		Secret:   agentPB.GetClientSecret(),
  		Username: agentPB.GetUsername(),
  		Password: agentPB.GetPassword(),
  	}, err
  }
docs: // load loads the user agent and App config from an AgentFile (legacy graw 0.3.0
  // file format).