Fix #30571: fix NPE in OpenIdReAuthorizeFilter

Author: LEDfan

src/main/java/eu/openanalytics/containerproxy/auth/impl/oidc/OpenIdReAuthorizeFilter.java

@@ -109,8 +109,10 @@ protected void doFilterInternal(@Nonnull HttpServletRequest request, @Nonnull Ht
      * See {@link RefreshTokenOAuth2AuthorizedClientProvider}
      */
     private boolean accessTokenExpired(OAuth2AuthorizedClient authorizedClient) {
-        return authorizedClient.getAccessToken().getExpiresAt() == null ||
-                clock.instant().isAfter(authorizedClient.getAccessToken().getExpiresAt().minus(this.clockSkew));
+        if (authorizedClient == null || authorizedClient.getAccessToken() == null || authorizedClient.getAccessToken().getExpiresAt() == null) {
+            return true;
+        }
+        return clock.instant().isAfter(authorizedClient.getAccessToken().getExpiresAt().minus(this.clockSkew));
     }
 
 }