code: func GetPasswdPrompt(prompt string, mask bool, r FdReader, w io.Writer) ([]byte, error) {
  	return getPasswd(prompt, mask, r, w)
  }
docs: // GetPasswdPrompt prompts the user and returns the password read from the terminal.
  // If mask is true, then asterisks are echoed.
  // The returned byte array does not include end-of-line characters.