GITBOOK-542: change request with no subject merged in GitBook

pentesting-cloud/gcp-security/gcp-unaunthenticated-enum-and-access/gcp-api-keys-unauthenticated-enum.md

@@ -35,9 +35,26 @@ Search it for example in Github following: [https://github.com/search?q=%2FAIza%
 This is extremely useful to check to **which GCP project an API key that you have found belongs to**:
 
 ```bash
+# If you have permissions
 gcloud services api-keys lookup AIzaSyD[...]uE8Y
 name: projects/5[...]6/locations/global/keys/28d[...]e0e
 parent: projects/5[...]6/locations/global
+
+# If you don't, you can still see the project ID in the error msg
+gcloud services api-keys lookup AIzaSy[...]Qbkd_oYE
+ERROR: (gcloud.services.api-keys.lookup) PERMISSION_DENIED: Permission 'apikeys.keys.lookup' denied on resource project.
+Help Token: ARD_zUaNgNilGTg9oYUnMhfa3foMvL7qspRpBJ-YZog8RLbTjCTBolt_WjQQ3myTaOqu4VnPc5IbA6JrQN83CkGH6nNLum6wS4j1HF_7HiCUBHVN
+- '@type': type.googleapis.com/google.rpc.PreconditionFailure
+  violations:
+  - subject: ?error_code=110002&service=cloudresourcemanager.googleapis.com&permission=serviceusage.apiKeys.getProjectForKey&resource=projects/89123452509
+    type: googleapis.com
+- '@type': type.googleapis.com/google.rpc.ErrorInfo
+  domain: apikeys.googleapis.com
+  metadata:
+    permission: serviceusage.apiKeys.getProjectForKey
+    resource: projects/89123452509
+    service: cloudresourcemanager.googleapis.com
+  reason: AUTH_PERMISSION_DENIED
 ```
 
 ### Brute Force API endspoints