fix(acp): update auth handshake to spec (#19725)

packages/core/src/config/config.test.ts

@@ -499,6 +499,7 @@ describe('Server Config (config.ts)', () => {
       expect(createContentGeneratorConfig).toHaveBeenCalledWith(
         config,
         authType,
+        undefined,
       );
       // Verify that contentGeneratorConfig is updated
       expect(config.getContentGeneratorConfig()).toEqual(mockContentConfig);