private void hostFileOnline(InputStream attachment, Consumer<String> callback) {
        try {
            String text = IOUtils.toString(attachment, StandardCharsets.UTF_8.name());
            Request request = WebUtils.defaultRequest().post(RequestBody.create(null, text.getBytes()))
                    .url(PASTE_SERVER + "documents").addHeader("Content-Type", ContentType.TEXT_HTML.getType()).build();

            WebUtils.ins.prepareRaw(request, (result) -> WebParserUtils.toJSONObject(result, new ObjectMapper()))
                    .async((json) -> {
                        String key = json.get("key").asText();
                        System.out.println("KEY: " + key);
                        callback.accept(PASTE_SERVER + key);
                    }, (error) -> {
                        error.printStackTrace();
                        callback.accept("Error: " + error.getMessage());
                    });
        } catch (IOException e) {
            throw new IllegalArgumentException(e);
        }
    }