added handle error example

Author: yunchengyang515

.github/workflows/example-workflows.yml

@@ -43,3 +43,8 @@ jobs:
         stackql exec -i ./examples/google-example.iql --auth="${AUTH}"
       env:
         AUTH: ${{ vars.AUTH }}  ## '{ "google": { "type": "service_account",  "credentialsfilepath": "sa-key.json" }}'
+
+    - name: handle error
+      run: | ## use the secret to create json file
+        stackql exec -i ./examples/github-example.iql --auth="${INVALID_AUTH}"
+