Thanks for elaborating @kristyb. I see how your flow works for a closed community. For open sign up however, I’m finding that with the two way sync, an access code from the sign in with code block immediately adds the user to Airtable. This is a no code work around to authenticate an email address, but the trick after this seems to be configuring a User Profile block to capture more user info and password so they can log in again.
If anyone sees issues with this on-boarding workflow, please let me know and thanks in advance!