Hello Kirill,
Thank you so much for using our theme AcmeBlog. As per your question, this features in no available on theme, because as per WordPress standards, integrating plugin is not allowed, so plugin is not added on theme. If you need this features, please find the plugin with that features. https://wordpress.org/plugins/
If you faced any problem, let us know. We will do our best to help you.
Kind Regards,
Acme Supports