Removed unused config value

The config value `audience` was used to set the baseUrl which has a static value.
The audience parameter is static in the used library. Therefore, the reading of the config value was removed.

Signed-off-by: Severin Wischmann <severinwischmann@nianticlabs.com>

plugins/auth-backend-module-atlassian-provider/src/authenticator.ts

@@ -29,8 +29,7 @@ export const atlassianAuthenticator = createOAuthAuthenticator({
   initialize({ callbackUrl, config }) {
     const clientId = config.getString('clientId');
     const clientSecret = config.getString('clientSecret');
-    const baseUrl =
-      config.getOptionalString('audience') || 'https://api.atlassian.com';
+    const baseUrl = 'https://auth.atlassian.com';
 
     return PassportOAuthAuthenticatorHelper.from(
       new AtlassianStrategy(

plugins/auth-backend-module-atlassian-provider/src/module.test.ts

@@ -60,7 +60,7 @@ describe('authModuleAtlassianProvider', () => {
     expect(nonceCookie).toBeDefined();
 
     const startUrl = new URL(res.get('location'));
-    expect(startUrl.origin).toBe('https://api.atlassian.com');
+    expect(startUrl.origin).toBe('https://auth.atlassian.com');
     expect(startUrl.pathname).toBe('/authorize');
     expect(Object.fromEntries(startUrl.searchParams)).toEqual({
       response_type: 'code',

plugins/auth-backend/src/providers/atlassian/provider.ts

@@ -14,9 +14,7 @@
  * limitations under the License.
  */
 
-import { AuthHandler } from '../types';
-import { OAuthResult } from '../../lib/oauth';
-import { createAuthProviderIntegration } from '../createAuthProviderIntegration';
+import { atlassianAuthenticator } from '@backstage/plugin-auth-backend-module-atlassian-provider';
 import {
   SignInResolver,
   createOAuthProviderFactory,
@@ -25,7 +23,9 @@ import {
   adaptLegacyOAuthHandler,
   adaptLegacyOAuthSignInResolver,
 } from '../../lib/legacy';
-import { atlassianAuthenticator } from '@backstage/plugin-auth-backend-module-atlassian-provider';
+import { OAuthResult } from '../../lib/oauth';
+import { createAuthProviderIntegration } from '../createAuthProviderIntegration';
+import { AuthHandler } from '../types';
 
 /**
  * Auth provider integration for Atlassian auth