plugins: migrate usage of deprecated IdentityApi methods

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/fossa/src/api/FossaClient.test.ts

@@ -25,8 +25,8 @@ import { UrlPatternDiscovery } from '@backstage/core-app-api';
 const server = setupServer();
 
 const identityApi = {
-  async getIdToken() {
-    return Promise.resolve('fake-id-token');
+  async getCredentials() {
+    return { token: 'fake-id-token' };
   },
 } as IdentityApi;
 

plugins/fossa/src/api/FossaClient.ts

@@ -57,7 +57,7 @@ export class FossaClient implements FossaApi {
     query: Record<string, any>,
   ): Promise<T> {
     const apiUrl = `${await this.discoveryApi.getBaseUrl('proxy')}/fossa`;
-    const idToken = await this.identityApi.getIdToken();
+    const { token: idToken } = await this.identityApi.getCredentials();
     const response = await fetch(
       `${apiUrl}/${path}?${new URLSearchParams(query).toString()}`,
       {