TokenRefreshInterceptor overwrites Oauth token to empty string

[precompiler]

Describe the bug

If no auth provider config found or auth provider is not OIDC, the new Config should inherit the oauth token from the old Config, but with current logic, it'll always be empty.

if (newestConfig.getAuthProvider() != null && newestConfig.getAuthProvider().getName().equalsIgnoreCase("oidc")) {
  newAccessToken = OpenIDConnectionUtils.resolveOIDCTokenFromAuthConfig(newestConfig.getAuthProvider().getConfig(),
      factory.newBuilder());
} else {
  **newAccessToken = CompletableFuture.completedFuture(newestConfig.getOauthToken());** // newAccessToken will always be empty.
}

code link:

kubernetes-client/kubernetes-client-api/src/main/java/io/fabric8/kubernetes/client/utils/TokenRefreshInterceptor.java

Lines 70 to 75 in 0bd34f8

	if (newestConfig.getAuthProvider() != null && newestConfig.getAuthProvider().getName().equalsIgnoreCase("oidc")) {
	newAccessToken = OpenIDConnectionUtils.resolveOIDCTokenFromAuthConfig(newestConfig.getAuthProvider().getConfig(),
	factory.newBuilder());
	} else {
	newAccessToken = CompletableFuture.completedFuture(newestConfig.getOauthToken());
	}

Fabric8 Kubernetes Client version

6.1.1

Steps to reproduce

Config config = new ConfigBuilder().withMasterUrl("https://k8s.url")
.withCaCertData("xxx...xxx")
.withOauthToken("valid-token")
.build();
KubernetesClient client = new KubernetesClientBuilder().withConfig(config).build();
client.apps().deployments().list().getItems().forEach(System.out::println); // works
Thread.sleep(2 * 60 * 1000);
client.apps().deployments().list().getItems().forEach(System.out::println); // will fail with 401 as TokenRefreshInterceptor will overwrite oauth token to empty string

Expected behavior

If no auth provider config found or auth provider is not OIDC, the new Config should inherit the oauth token from the old Config

Runtime

Kubernetes (vanilla)

Kubernetes API Server version

1.23

Environment

Azure

Fabric8 Kubernetes Client Logs

No response

Additional context

No response