I was wondering if there was any way in Keycloak to force the authentication of a user?

From my application, I may need a user to reverify their credentials.  They will likely already have a session with keycloak open, but I need them to re-enter their credentials.  Is there a way to do this?  Or even an API call I can make with the user's credentials to verify them?

Likewise, I need to be able to provide a SAML ForceAuth=true.  Is this possible in Keycloak?

John