} finally {
            Optional.ofNullable(authSuccessEventCallback).ifPresent(SimpleBitfinexApiBroker::safeClose);
            Optional.ofNullable(authFailedCallback).ifPresent(SimpleBitfinexApiBroker::safeClose);
            Optional.ofNullable(positionInitCallback).ifPresent(SimpleBitfinexApiBroker::safeClose);
            Optional.ofNullable(walletsInitCallback).ifPresent(SimpleBitfinexApiBroker::safeClose);