title: Customize OAuth CallBackPath Controller in .Net Core
body: <p>I want to use OAuth in my .net core web App. </p>
  
  <p>On my Startup file, I've added services.AddAuthentication( .... ).AddCookies(...).AddOAuth(...);</p>
  
  <p>It works properly. Now I want to customize the way my callback controller works. How can I do that?</p>
  
  <pre><code>options.CallbackPath = new PathString("/web/callback");
  </code></pre>
  
  <p>because the API I'm working with does not implement OAuth2/OpenIdConnect ...  </p>