How to determine that a VK bot came to the site?

Question

Search Engine Optimization

My site display template depends on who visited the site, and for example, if a person shares a link on facebook, then I know that "facebookexternalhit" will come to me and he is given a page in the desired format.
So the question is - how to determine that a vk bot has entered?
vkshare tried

Answer 1

Mozilla/5.0 (compatible; vkShare; +vk.com/dev/Share)