We are using CAP Java framework for our Multitenant Application. For some scenarios we run into an issue where a tenant Id which is known to us might have been unsubscribed and when we try to set it to the CdsRuntime RequestContext, throws an error. We are looking for a way where we can ask the MTX Sidecar to check if this tenant id is known to it. This would help us to deal with these invalid tenant Ids. Is there such an API or library that we can use?