From the keycloak documentation and
https://keycloak.github.io/docs/userguide/keycloak-server/html/auth_spi.html
it is not very clear to me what the OPTIONAL setting for an execution mean.
For example, when we have the following:
Forms Subflow - ALTERNATIVE
Username/Password Form - REQUIRED
OTP Password Form - OPTIONAL
When can it enter the Optional OTP form? Do we need to add some code (some
condition ?) in the UsernamePasswordAuthentication Code, so it enters the
optional OTP form authenticator? Or something else? I am not so clear about
the concept of this optional field and how to enter it. Can someone please
explain this in detail?