How to terminate MFA flow with an error?

[Cantor, Scott]

> Following up my previous email, I tried returning "DuoSignup" from the MFA
> transition map and the IDP apparently insists on it being a flow name.

If you want me to dig into it, get Jim to get you into the access table for UV so I can give you access to JIRA, but my guess is the transition logic in the MFA code must be assuming they're flows, so the work around is probably to do a one-off flow that just signals the custom event as its result.

-- Scott