title: Identity server is keep showing "Showing login: User is not authenticated" in /connect/authorize/callback
body: <p>Using IdentityServer4, I'm implementing Code flow authorization on an existing system which supports only ResourceOwnerPassword grant type in IdentityServer and works well.</p>
  
  <p>I got into a stage where the user is promoted to authenticate, then redirected to <code>server connect/authorize/callback</code></p>
  
  <p>After that it is not authenticating and coming back to the login page. From the log, I got the following:</p>
  
  <ol>
  <li><blockquote>
    <p>Invoking IdentityServer endpoint: IdentityServer4.Endpoints.AuthorizeCallbackEndpoint for /connect/authorize/callback</p>
  </blockquote></li>
  <li><p>ValidatedAuthorizeRequest</p>
  
  <pre><code>{
  "ClientId": "demo",
  "ClientName": "MVC Client Demo",
  "RedirectUri": "http://localhost:5002/signin-oidc",
  "AllowedRedirectUris": ["http://openidclientdemo.com:8001/signin-oidc",
  "http://localhost:5002/signin-oidc"],
  "SubjectId": "anonymous",
  "ResponseType": "code id_token",
  "ResponseMode": "form_post",
  "GrantType": "hybrid",
  "RequestedScopes": "openid profile default-api",
  "State": "CfDJ8DU4Xalc7d9HttaFlZ-UaDhGsjeeEccTfNiNZFz3yYZI9MfXjrXo2TAzT9f6-F2VEdC7bWtcD7HRJgkqrh4t0oTAe_47IBfcm5Fsde9bVRorq-CHcL6_c15Vz1G5LJyEzqX6tyjhcZ2g3J2JjxD1PME1W7sq9YSddhQUJmxt4bVi70wdTtXXp0tH0SKyb0vLCs3eIjOln792nobaFOCM7r3VJ8BfXfpDm2pOOmBlR7zCCBxFCivwj7Zmy5Tu8Z09MvzOaLEkPBSL5i9GyxmGiB0P6osBPYEDyoRfgy2qDigH3QqLmLYjfE6NrgcgIGO9kgXuUT52XgALV_ZKjNbih-Y",
  "Nonce": "636702233595840569.NGQ3NGVlODMtYTVhNy00MjM4LWFhNGQtNTFiZTE3ZjllZmUzNjU5MGNmNjktNjg3Yy00YmZlLWEwYWYtYmMzM2QxZmZlNjBk",
  "Raw": {
      "client_id": "demo",
      "redirect_uri": "http://localhost:5002/signin-oidc",
      "response_type": "code id_token",
      "scope": "openid profile default-api",
      "response_mode": "form_post",
      "nonce": "636702233595840569.NGQ3NGVlODMtYTVhNy00MjM4LWFhNGQtNTFiZTE3ZjllZmUzNjU5MGNmNjktNjg3Yy00YmZlLWEwYWYtYmMzM2QxZmZlNjBk",
      "state": "CfDJ8DU4Xalc7d9HttaFlZ-UaDhGsjeeEccTfNiNZFz3yYZI9MfXjrXo2TAzT9f6-F2VEdC7bWtcD7HRJgkqrh4t0oTAe_47IBfcm5Fsde9bVRorq-CHcL6_c15Vz1G5LJyEzqX6tyjhcZ2g3J2JjxD1PME1W7sq9YSddhQUJmxt4bVi70wdTtXXp0tH0SKyb0vLCs3eIjOln792nobaFOCM7r3VJ8BfXfpDm2pOOmBlR7zCCBxFCivwj7Zmy5Tu8Z09MvzOaLEkPBSL5i9GyxmGiB0P6osBPYEDyoRfgy2qDigH3QqLmLYjfE6NrgcgIGO9kgXuUT52XgALV_ZKjNbih-Y",
      "x-client-SKU": "ID_NET",
      "x-client-ver": "2.1.4.0",
      "accessToken": "4155a526-2bb1-4d88-ba3a-21cb3a91f266",
      "userId": "MQ=="
  }
  </code></pre>
  
  <p>}</p></li>
  <li><blockquote>
    <p>Showing login: User is not authenticated</p>
  </blockquote></li>
  </ol>
  
  <hr>
  
  <p>It is not clear for me what caused the authentication failure, any idea?</p>