How to use the maestral.gui.utils.UserDialog function in maestral

def _get_or_start_maestral_daemon(self):

        pid = get_maestral_pid(CONFIG_NAME)
        if pid:
            self._started = False
        else:
            if IS_MACOS_BUNDLE:
                res = start_maestral_daemon_thread(CONFIG_NAME)
            else:
                res = start_maestral_daemon_process(CONFIG_NAME)

            if res is False:
                error_dialog = UserDialog(
                    "Could not start Maestral",
                    "Could not start or connect to sync daemon. Please try again and " +
                    "contact the developer if this issue persists."
                )
                error_dialog.exec_()
                self.quit()
            else:
                self._started = True

        return get_maestral_daemon_proxy(CONFIG_NAME)

def _notify_updates_user_requested(self, res):

        if res["error"]:
            update_dialog = UserDialog("Could not check for updates", res["error"])
            update_dialog.exec_()
        elif res["update_available"]:
            self._show_update_dialog(res)
        elif not res["update_available"]:
            message = 'Maestral v{} is the newest version available.'.format(res["latest_release"])
            update_dialog = UserDialog("You’re up-to-date!", message)
            update_dialog.exec_()

msg_box.setAcceptButtonName("Keep")
            msg_box.addSecondAcceptButton("Replace", icon="edit-clear")
            msg_box.addCancelButton()
            res = msg_box.exec_()

            if res == 1:
                pass
            elif res == 2:
                shutil.rmtree(dropbox_path, ignore_errors=True)
            else:
                return

        elif osp.isfile(dropbox_path):
            msg = ('There already is a file named "{0}" at this location. Would '
                   'you like to replace it?'.format(self.mdbx.get_conf("main", "default_dir_name")))
            msg_box = UserDialog("File conflict", msg, parent=self)
            msg_box.setAcceptButtonName("Replace")
            msg_box.addCancelButton()
            res = msg_box.exec_()

            if res == 0:
                return
            else:
                delete_file_or_folder(dropbox_path)

        self.mdbx.create_dropbox_directory(path=dropbox_path, overwrite=False)

        # switch to next page
        self.mdbx.set_conf("main", "excluded_folders", [])
        self.stackedWidget.slideInIdx(3)
        self.treeViewFolders.setFocus()

def _show_update_dialog(res):
        url_r = "https://github.com/samschott/maestral-dropbox/releases"
        message = (
            'Maestral v{0} is available. Please use your package manager to '
            'update Maestral or go to the <a href="\&quot;{1}\&quot;"><span>releases</span></a> '
            'page to download the new version. '
            '<div style="height:5px;font-size:5px;">&nbsp;<br></div>'
            '<b>Release notes:</b>'
        ).format(res["latest_release"], url_r)
        list_style = '<ul style="margin-top: 0px; margin-bottom: 0px; margin-left: -20px; ' \
                     'margin-right: 0px; -qt-list-indent: 1;">'
        styled_release_notes = res["release_notes"].replace('<ul>', list_style)
        update_dialog = UserDialog("Update available", message, styled_release_notes)
        update_dialog.exec_()
        update_dialog.deleteLater()
</ul></ul>

def _stop_and_exec_error_dialog(self, title, message, exc_info=None):
        self.setIcon(SYNC_ERROR)

        if self.mdbx:
            self.mdbx.stop_sync()
        if self.pauseAction:
            self.pauseAction.setText("Start Syncing")

        error_dialog = UserDialog(title, message, exc_info)
        error_dialog.exec_()

def _notify_updates_user_requested(self, res):

        if res["error"]:
            update_dialog = UserDialog("Could not check for updates", res["error"])
            update_dialog.exec_()
        elif res["update_available"]:
            self._show_update_dialog(res)
        elif not res["update_available"]:
            message = 'Maestral v{} is the newest version available.'.format(res["latest_release"])
            update_dialog = UserDialog("You’re up-to-date!", message)
            update_dialog.exec_()

def on_auth_clicked(self):

        if self.lineEditAuthCode.text() == "":
            msg = "Please enter an authentication token."
            msg_box = UserDialog("Authentication failed.", msg, parent=self)
            msg_box.open()
        else:
            self.progressIndicator.startAnimation()
            self.pushButtonAuthPageLink.setEnabled(False)
            self.lineEditAuthCode.setEnabled(False)

            self.verify_token_async()