use @kubernetes/client-node to generate default config (#51)

src/kubeconfigs/default.ts

@@ -1,5 +1,6 @@
 import * as core from "@actions/core";
 import * as jsyaml from "js-yaml";
+import { KubeConfig } from "@kubernetes/client-node";
 import { K8sSecret, parseK8sSecret } from "../types/k8sSecret";
 import { Method, parseMethod } from "../types/method";
 
@@ -58,25 +59,18 @@ export function createKubeconfig(
   token: string,
   clusterUrl: string
 ): string {
-  const kubeconfig = {
-    apiVersion: "v1",
-    kind: "Config",
-    clusters: [
-      {
-        cluster: {
-          "certificate-authority-data": certAuth,
-          server: clusterUrl,
-        },
-      },
-    ],
-    users: [
-      {
-        user: {
-          token: token,
-        },
-      },
-    ],
-  };
-
-  return JSON.stringify(kubeconfig);
+  const kc = new KubeConfig();
+  kc.loadFromClusterAndUser(
+    {
+      name: "default",
+      server: clusterUrl,
+      caData: certAuth,
+      skipTLSVerify: false,
+    },
+    {
+      name: "default-user",
+      token,
+    }
+  );
+  return kc.exportConfig();
 }