title: Implement OpenIdDict auth backend(Asp.Net core) to be able to auth with model entity and LinkedIn authorization
body: <p>The goal is to be able to login in mobile app(react native) with:</p>
  
  <ul>
  <li>in app <code>username and password</code></li>
  <li><code>"Login with LinkedId"</code> feature.</li>
  </ul>
  
  <p>I've researched a lot on this topic, and read the Kévin Chalet's(@Pinpoint) blog series and also cloned the sampels from: <a href="https://github.com/openiddict/openiddict-samples" rel="nofollow noreferrer">https://github.com/openiddict/openiddict-samples</a></p>
  
  <p>I've created test server app:<a href="https://github.com/Jamaxack/OpenIdConnectAuthLinkedIn" rel="nofollow noreferrer">https://github.com/Jamaxack/OpenIdConnectAuthLinkedIn</a></p>
  
  <p>I'm able to test the authorization to LinkedIn with <a href="https://oidcdebugger.com" rel="nofollow noreferrer">https://oidcdebugger.com</a> but now, I'm confused. Without <a href="https://oidcdebugger.com" rel="nofollow noreferrer">https://oidcdebugger.com</a> how can I test the LinkedIn authorization? for example with Postman? For my case what Auth flow should I use?</p>
  
  <pre><code> options.AllowImplicitFlow()
          .AllowPasswordFlow()
          .AllowAuthorizationCodeFlow()
          .AllowRefreshTokenFlow();
  </code></pre>
  
  <p>Thanks in advance.</p>