Forward to additional backend for MFA

[fekberg]

In a ResponseMicroService I'd like to redirect to an additional backend to prove the LoA (Level of Assurance).

Using Redirect("/additiona-backend") doesn't work as it has already cleared the data from the successful auth. Therefore backend_state = context.state[self.name] throws an error.

In short, I first want the user to authenticate with Entra (SAML) and after that they need to make an additional authentication using OIDC with a separate backend.

Any pointers are much appreciated