protected void closeCallUnauthenticated(final ServerCall<?, ?> call, final AuthenticationException aex) {
        log.debug(UNAUTHENTICATED_DESCRIPTION, aex);
        call.close(Status.UNAUTHENTICATED.withCause(aex).withDescription(UNAUTHENTICATED_DESCRIPTION), new Metadata());
    }
Close the call with {@link Status#UNAUTHENTICATED}.

@param call The call to close.
@param aex The exception that was the cause.
grpc-server-spring-boot-starter/src/main/java/net/devh/boot/grpc/server/security/interceptors/ExceptionTranslatingServerInterceptor.java