A simple text input with hidden characters
Nice Idea. I like this. 🙂
I would implement the password function by making it so that this value allows us to proceed or not in the flow of our bot.
For example the access to a reserved area where show information taken from an external google sheet or simply show private content that you want to show only to certain users inviting the others, who do not have the password, to sign up redirecting them, for example, on your site.