Fix getDefault for kubernetesFetcherExtensionPoint

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

.changeset/heavy-lies-listen.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-kubernetes-backend': patch
+---
+
+Fix a bug where `getDefault` in the `kubernetesFetcherExtensionPoint` had the wrong `this` value

plugins/kubernetes-backend/src/service/KubernetesInitializer.ts

@@ -183,8 +183,9 @@ export class KubernetesInitializer {
 
   async init() {
     const fetcher =
-      (await this.opts.fetcher?.({ getDefault: this.defaultFetcher })) ??
-      (await this.defaultFetcher());
+      (await this.opts.fetcher?.({
+        getDefault: () => this.defaultFetcher(),
+      })) ?? (await this.defaultFetcher());
 
     const authStrategyMap =
       this.opts.authStrategyMap ?? (await this.defaultAuthStrategy());