Dexie cloud unregistered user + login UI

[sarink]

I have our cloud configured to reject unknown users. If a user tries to sign up, they fill out the login form, enter the OTP, then I correctly see an error in the console "user is not registered" -- but how can I catch this error in my app?

Also, with a custom login GUI, how do you handle the interstitial state between the user clicking submit (send OTP) and the "ui" observable updating with the new "enter OTP" form? There's a delay. But it doesn't appear that there's any onSubmit callback or way to handle this?