;
            }
        }
        String authHeader;
        if (response == HTTP_UNAUTHORIZED) {
            authHeader = "WWW-Authenticate";
            authProperty = "Authorization";
        } else {
            authHeader = "Proxy-Authenticate";
            authProperty = "Proxy-Authorization";
        }
        String authorization = null;

The `password` "flow" is one of the ways ("flows") defined in OAuth2, to handle security and authentication.

OAuth2 was designed so that the backend or API could be independent of the server that authenticates the user.

But in this case, the same **FastAPI** application will handle the API and the authentication.

So, let's review it from that simplified point of view:

* The OpenID Connect authenticator can now use a custom prefix, or omit the default prefix, for username and groups claims through the --oidc-username-prefix and --oidc-groups-prefix flags. For example, the authenticator can map a user with the username "jane" to "google:jane" by supplying the "google:" username prefix. ([#50875](https://github.com/kubernetes/kubernetes/pull/50875),...

- Promoted the feature gate `HonorPVReclaimPolicy` to GA. ([#129583](https://github.com/kubernetes/kubernetes/pull/129583), [@carlory](https://github.com/carlory)) [SIG Apps, Storage and Testing]

          throw ProtocolException("Received HTTP_PROXY_AUTH (407) code while not using proxy")
        }
        return client.proxyAuthenticator.authenticate(route, userResponse)
      }

      HTTP_UNAUTHORIZED -> return client.authenticator.authenticate(route, userResponse)

      HTTP_PERM_REDIRECT, HTTP_TEMP_REDIRECT, HTTP_MULT_CHOICE, HTTP_MOVED_PERM, HTTP_MOVED_TEMP, HTTP_SEE_OTHER -> {

        cloneInternal(cloned, this);
        return cloned;
    }

    /**
     * Clone internal fields from one authenticator to another.
     *
     * @param cloned the target authenticator to copy to
     * @param toClone the source authenticator to copy from
     */
    protected static void cloneInternal(NtlmPasswordAuthenticator cloned, NtlmPasswordAuthenticator toClone) {

- Fix a bug in cronjob controller...

import jakarta.annotation.PostConstruct;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;

/**
 * Authenticator for SAML.
 */
public class SamlAuthenticator implements SsoAuthenticator {

    /**
     * Constructor.
     */
    public SamlAuthenticator() {
        super();
    }

        .Builder()
        .add("WWW-Authenticate: Basic realm=\"protected area\"")
        .build()
    assertThat(headers.parseChallenges("WWW-Authenticate"))
      .isEqualTo(listOf(Challenge("Basic", mapOf("realm" to "protected area"))))
  }

  @Test fun basicChallengeWithCharset() {
    val headers =
      Headers
        .Builder()
        .add("WWW-Authenticate: Basic realm=\"protected area\", charset=\"UTF-8\"")

## Changes to API Resources
### ABAC
* ABAC policies using `"user":"*"` or `"group":"*"` to match all users or groups will only match authenticated requests. To match unauthenticated requests, ABAC policies must explicitly specify `"group":"system:unauthenticated"` ([#38968](https://github.com/kubernetes/kubernetes/pull/38968), [@liggitt](https://github.com/liggitt))

### Admission Control