Solution:

https://github.com/FusionAuth/go-client/issues/48

Yes. A user can have one-to-many refresh tokens per application.

The user and registration may have a username field. The username field on the user is the one that can be used to login. In general you will want to use the Search API for those types of queries rather than directly accessing the database.

The reason is because the API is documented and stable, and the database is undocumented and may change.

Referencing/linking below for future guidance for folks who view this post:

https://fusionauth.io/community/forum/topic/900/authentication-for-an-application-with-web-client-and-mobile-front-ends

If you want to use the breached password detection feature, then that check will be applied for any new account registrations.

You could always disable the breached password detection feature.

Sorry, I don't have a better answer for you.

You could use the skipVerification parameter (set it to true) on the user or registration create statement, and then the https://fusionauth.io/docs/v1/tech/apis/users#resend-verification-email call with sendVerifyEmail set to false.

This would give you a verificationId you could use with this API call: https://fusionauth.io/docs/v1/tech/apis/users#verify-a-users-email

@ashok glad you solved the problem!

The only problem is that I don't seem to be able to pass all the tokens and then "map" it out in the backend.

I'm not sure what you mean here. Are you not seeing all the tokens in the lambda? Or are you not able to put them all in the custom claim?

Also, I think I already know the answer to this and this may sound dumb, but how can you have multiple tokens? A user with multiple providers? If so, how are they consolidated and combined?

A token is tied to a registration/application, so someone could login with google to one FusionAuth application and with facebook to another. Unless I'm missing something, I don't believe they are combined.

Lastly, it would have been nice if user.registrations had a providers field.

We welcome your feature requests 🙂 . Please file a github issue: https://github.com/fusionauth/fusionauth-issues/issues