fix: use graph API target url for access token

this fixes #15998

Signed-off-by: Heikki Hellgren <heikki.hellgren@op.fi>

.changeset/four-rivers-enjoy.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-catalog-backend-module-msgraph': patch
+---
+
+Fix MS Graph provider to use target URL for fetching access token

plugins/catalog-backend-module-msgraph/src/microsoftGraph/client.test.ts

@@ -53,7 +53,7 @@ describe('MicrosoftGraphClient', () => {
     expect(await response.json()).toEqual({ value: 'example' });
     expect(tokenCredential.getToken).toHaveBeenCalledTimes(1);
     expect(tokenCredential.getToken).toHaveBeenCalledWith(
-      'https://graph.microsoft.com/.default',
+      'https://example.com/.default',
     );
   });
 

plugins/catalog-backend-module-msgraph/src/microsoftGraph/client.ts

@@ -214,7 +214,7 @@ export class MicrosoftGraphClient {
   ): Promise<Response> {
     // Make sure that we always have a valid access token (might be cached)
     const token = await this.tokenCredential.getToken(
-      'https://graph.microsoft.com/.default',
+      `${this.baseUrl}/.default`,
     );
 
     if (!token) {