How to send a POST request from Unity?

Question

API

Hello!

I'm interested in how you can send POST requests to the server.
Please, if you know how to do this, then write on the example of sending a request using the VK API and the message.send method
Thank you!

Unity, c#

PS I know that the Internet is full of information, but I'm a noob in this, so I ask you to live everything :)