Like a person through a third-party site using vk api?

Question

JavaScript

Hello. I want to get a job, faced with a test task. It is necessary to create a site that, using nodejs + vk.api, will determine that a person is authorized and like the person whose id will be entered into the form on the site. The whole problem is that I have never worked with the VKontakte api, and when I started digging through the official documentation, I saw that they had very few examples and a not very accessible explanation. You can throw off the finished project using vk api + node and doing some simple actions and just suggest the algorithm itself and the methods used to implement it. Or at least just to advise in which direction to move. Thank you! :)