Hello maxop,
Great question, I am also looking to implement the same functionality and got stuck here. Did you find a way to implement it?
Also I would like to ask, how did you implement passwordless flow for your first-party application? Are you using the libraries or directly the authentication API?
We are currently calling authentication API directly from our backend server.
our clients (mobile app and web app) would send the client_id to the backend server, then backend server will append the client_secret and route the request to auth0 for authentication.
Not sure if this is the right way to approach? It would be great if you can share any suggessions?