WebClient client = WebClient.builder()
        .clientConnector(new ReactorClientHttpConnector(httpClient1))
        .baseUrl(String.format(FILE_DOWNLOAD_PATH))
        .build();
WebClient.RequestBodyUriSpec method = client.method(HttpMethod.GET);
method.header("Authorization", "Bearer " + accessToken);
final Flux<DataBuffer> dataBufferFlux = method.retrieve().bodyToFlux(DataBuffer.class);
final Path path = FileSystems.getDefault().getPath("example" + new Random(200).nextInt() + ".zip");
WritableByteChannel channel = Files.newByteChannel(path, StandardOpenOption.CREATE_NEW, StandardOpenOption.WRITE);
Mono<Path> then = DataBufferUtils.write(dataBufferFlux, channel)
        .map(DataBufferUtils::release)
        .then(Mono.just(path));