code: func getAPIKey(options *bees.BeeOptions) string {
  	var apiKey string
  	options.Bind("api_key", &apiKey)
  
  	if strings.HasPrefix(apiKey, "file://") {
  		buf, err := ioutil.ReadFile(strings.TrimPrefix(apiKey, "file://"))
  		if err != nil {
  			panic("Error reading API key file " + apiKey)
  		}
  		apiKey = string(buf)
  	}
  
  	if strings.HasPrefix(apiKey, "env://") {
  		buf := strings.TrimPrefix(apiKey, "env://")
  		apiKey = os.Getenv(string(buf))
  	}
  
  	return strings.TrimSpace(apiKey)
  }
docs: // Gets the Bot's API key from a file, the recipe config or the
  // TELEGRAM_API_KEY environment variable.