title: Get unique identifier of client in Asp.Net WebApi Core 2.0?
body: <p>I'm looking for an unique identifier of clients in WebApi Core 2.0<br>
  I tested <code>HttpContext.Connection.Id</code>, it's the same for all browsers!</p>
  
  <pre><code>[HttpGet]
  public IActionResult GetConnectionId()
  {
      return Ok(new
      {
          ConnectionId = HttpContext.Connection.Id
      });
  }
  </code></pre>
  
  <p>Also I test it with a virtual machine, it was the same for all clients<br>
  How to get unique identifier of clients in Asp.Net WebApi Core 2?</p>