Thanks for sharing your numbers — impressive, congratulations!
Michael Kamleitner

At the moment you can use Facebooks account-linking feature.
But if you have more then a Facebook Bot (Kik, Telegram, …) you have to implement your own web-linking page.

  1. open webview e.g.
  2. implement a signup/signin on the webpage
  3. connect multiple users by UserId<=>chatBotUserId

In theory easy, but in practice little complicated to do it the right way and have a cool UI/UX in the webview popup inside the Chat App.

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