Interested in the next moment. Is there a website. The entrance to it is only possible through the social network. Create a profile on the website based on the information from the profile VK. Is it possible to pull from the VK friends list and see who else of my friends in VK has a profile on my website?
In other words: you and I are friends in VK. I also have an account on my website. Can I using VK to find out if you have an account on my website?