code: func PasswordKeyboardInteractive(password string) ssh.KeyboardInteractiveChallenge {
  	return func(user, instruction string, questions []string, echos []bool) ([]string, error) {
  		log.Printf("Keyboard interactive challenge: ")
  		log.Printf("-- User: %s", user)
  		log.Printf("-- Instructions: %s", instruction)
  		for i, question := range questions {
  			log.Printf("-- Question %d: %s", i+1, question)
  		}
  
  		// Just send the password back for all questions
  		answers := make([]string, len(questions))
  		for i := range answers {
  			answers[i] = string(password)
  		}
  
  		return answers, nil
  	}
  }
docs: // An implementation of ssh.KeyboardInteractiveChallenge that simply sends
  // back the password for all questions. The questions are logged.