How to add an userbot to your system?
Please check out @CheckRestriction which would be a great help for channel and group owners, to know if their channel or group is restrcited, and appropriately contact https://telegram.dog/DMCATelegram
I think, it's not possible for now.
Besides, since Telegramic uses the Telegram API, it can't be precise about that if the user is a bot or a real user. (If I'm wrong about that, please explain how can we get such an information with the Telegram API). Userbots are kinda special things to achieve something that you can't deal with in regular cases, especially in a situation where the Telegram Bot API is inadequate. But still they're real users in the sight of rational thinking so I don't think it is a good idea to list this sort of accounts in a directory.
My suggestion is to use a bot to redirect your users to the exact account you use as a userbot.