Migrating from Firebase to Auth0

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Hey all,

My team currently uses Google Firebase for all authentication. Currently we support 1.) signing in with Google and 2.) signing in with a username and password. For reference, our tech stack is SPA written in React and typescript.

I’m trying to migrate to Auth0, but I’m having a few issues:

  1. While Auth0 can easily add a “Sign in with Google”, I don’t know how to migrate all of the old usernames and passwords that are currently in firebase.
  2. We currently rely on a uid that Firebase returns to identify users for analytics. I imagine this would change when I switch users over to Auth0. Any way to use the same uid?
  3. Firebase has a handy callback, authInstance.onAuthStateChanged, that we can tap into whenever a user gets automatically logged out. Does Auth0 have anything similar?
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