@jkassel Just replying here so others can find this thread.
Thanks for pointing the typos out. I just fixed it.
Yeah a separate user is created through this process. This is because the federation happens in the Identity Pool. You are not connecting to the User Pool. One way to throw the error would be to check if a user with that email already exists before this line:
I should also that there another way to do this. You can use the User Pool to log the Facebook user in. But the way we talk about in this chapter is the one Amplify supports by default.
For the session expiry issue I don’t see the problem. Can you try the hosted version and see if you have the issue?