change: use updated auth on get_cluster

Author: carsonmh

src/codeflare_sdk/cluster/cluster.py

@@ -406,8 +406,8 @@ def get_current_namespace():  # pragma: no cover
 
 def get_cluster(cluster_name: str, namespace: str = "default"):
     try:
-        config.load_kube_config()
-        api_instance = client.CustomObjectsApi()
+        config_check()
+        api_instance = client.CustomObjectsApi(api_config_handler())
         rcs = api_instance.list_namespaced_custom_object(
             group="ray.io",
             version="v1alpha1",