title: Setup Identity Server For Some Controllers And Not Others In .NET Core Web API
body: <p>Suppose I had a new .NET Core 2.2 Web API Project with two controllers:</p>
  
  <pre><code>[ApiController]
  public class AController : ControllerBase
  {
  }
  
  [ApiController]
  public class BController : ControllerBase
  {
  }
  </code></pre>
  
  <p>How can I setup the identity server so that authenticating with a reference token is necessary to hit endpoints on AController, but not BController?</p>