Kubernetes Java client to create a pod(getting error without much detail). This is GCP K8 cluster - Stack Overflow

I have below code, that I am running on laptop:

public class PodDeployment {
    public void deploy() throws ApiException, IOException {
        ApiClient client = Config.defaultClient();
        Configuration.setDefaultApiClient(client);
        CoreV1Api api = new CoreV1Api(client);

        V1Container container = new V1Container();
        container.setName("nginxcontainer");
        container.setImage("nginx:latest");

        V1PodSpec podSpec = new V1PodSpec();
        podSpec.setContainers(List.of(container));

        V1Pod pod = new V1Pod();
        pod.setSpec(podSpec);
        pod.setMetadata(new V1ObjectMeta().name("nginxcontainer"));
        pod.apiVersion("v1");
        pod.kind("Pod");

        var result = api.createNamespacedPod("myns", pod, "true", "true", null, null);
        System.out.println("Pod created: " + result.getMetadata().getName());
// Create a new Deployment
    }
}

My creds that I have in .kube/config are fine as I can do kubectl apply.... and create a pod, etc. So I do not think it is the creds I see below error without much info as to what is invalid in my request(how do I get details)

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See .html#StaticLoggerBinder for further details.
Exception in thread "main" io.kubernetes.client.openapi.ApiException: Unprocessable Entity
    at io.kubernetes.client.openapi.ApiClient.handleResponse(ApiClient.java:973)
    at io.kubernetes.client.openapi.ApiClient.execute(ApiClient.java:885)
    at io.kubernetes.client.openapi.apis.CoreV1Api.createNamespacedPodWithHttpInfo(CoreV1Api.java:10251)
    at io.kubernetes.client.openapi.apis.CoreV1Api.createNamespacedPod(CoreV1Api.java:10203)
    at com.mypackage.PodDeployment.deploy(PodDeployment.java:31)
    at com.mypackage.Main.main(Main.java:22)