An optional redirect would be helpful; for instance, if a user from a specific client tries to access or log in, we could choose to send him to an error or maintenance page instead.
So in the Keycloak admin dashboard, under a specific client, we can choose to toggle the client into the maintenance page.
Then users attempting to log in or those who are already logged in will be redirected to a maintenance page.
It would be great if there was a way I could use it right now from the Keycloak side.