Modal modal = Modal.create("add-http-cats", "Add an HTTP cat")
        .addComponents(
                Label.of(
                        "HTTP Status Code",
                        TextInput.create("http-status-code", TextInputStyle.SHORT)
                                .setMaxLength(3)
                                .build()
                ),
                Label.of(
                        "File",
                        AttachmentUpload.create("cat-img")
                                .setMaxValues(10)
                                .build()
                )
        )
        .build();

String statusCode = event.getValue("http-status-code").getAsString();
List<Message.Attachment> cats = event.getValue("cat-img").getAsAttachmentList();