if completed.Authentication.ServiceAccounts.MaxExpiration != 0 {
			lowBound := time.Hour
			upBound := time.Duration(1<<32) * time.Second
			if completed.Authentication.ServiceAccounts.MaxExpiration < lowBound ||
				completed.Authentication.ServiceAccounts.MaxExpiration > upBound {
				return CompletedOptions{}, fmt.Errorf("the service-account-max-token-expiration must be between 1 hour and 2^32 seconds")
			}

                This is useful when you want to have optional authentication.

                It is also useful when you want to have authentication that can be
                provided in one of multiple optional ways (for example, in HTTP Basic
                authentication or in an HTTP Bearer token).
                """
            ),
        ] = True,
    ):

	"k8s.io/apiserver/pkg/authentication/authenticator"
	"k8s.io/apiserver/pkg/authentication/authenticatorfactory"
	"k8s.io/apiserver/pkg/authentication/group"
	"k8s.io/apiserver/pkg/authentication/request/anonymous"
	"k8s.io/apiserver/pkg/authentication/request/bearertoken"
	"k8s.io/apiserver/pkg/authentication/request/headerrequest"
	"k8s.io/apiserver/pkg/authentication/request/union"

}

// HasAuthenticationCredentials returns true if the current user has valid authentication credentials for
// token authentication, basic authentication or X509 authentication
func HasAuthenticationCredentials(config *clientcmdapi.Config) bool {
	authInfo := getCurrentAuthInfo(config)
	if authInfo == nil {
		return false
	}

	// token authentication
	if len(authInfo.Token) != 0 || len(authInfo.TokenFile) != 0 {
		return true

SataQiu <******@****.***> 1713430345 +0800

import org.apache.http.auth.AuthScheme;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.Credentials;
import org.codelibs.fess.crawler.client.http.Authentication;

/**
 * @author shinsuke
 *
 */
public class AuthenticationImpl implements Authentication {
    private AuthScope authScope;

    private Credentials credentials;

    private AuthScheme authScheme;

syntax = "proto2";

package k8s.io.api.authentication.v1alpha1;

import "k8s.io/api/authentication/v1/generated.proto";
import "k8s.io/apimachinery/pkg/apis/meta/v1/generated.proto";
import "k8s.io/apimachinery/pkg/runtime/generated.proto";
import "k8s.io/apimachinery/pkg/runtime/schema/generated.proto";

// Package-wide variables from generator "generated".
option go_package = "k8s.io/api/authentication/v1alpha1";

		), nil
	}

	// if the config returned from discovery has authentication credentials, proceed with the TLS boostrap process
	if kubeconfigutil.HasAuthenticationCredentials(config) {
		return config, nil
	}

	// if there are no authentication credentials (nor in the config returned from discovery, nor in the TLSBootstrapToken), fail

			token:         "",
			usages:        []string{"signing", "authentication"},
			extraGroups:   []string{"system:bootstrappers:foo"},
			expectedError: false,
		},
		{
			name:          "valid: non-empty token",
			token:         "abcdef.1234567890123456",
			usages:        []string{"signing", "authentication"},
			extraGroups:   []string{"system:bootstrappers:foo"},
			expectedError: false,
		},

        repositorySystem.injectAuthentication(Arrays.asList(repository), Arrays.asList(server));
        Authentication authentication = repository.getAuthentication();
        assertNotNull(authentication);
        assertEquals("jason", authentication.getUsername());
        assertEquals("abc123", authentication.getPassword());
    }