add creds to test

Author: SageGJ

.github/workflows/build.yml

@@ -90,6 +90,8 @@ jobs:
     if: ${{ always() }}
     runs-on: ubuntu-latest
     needs: [schema-convert]
+    env:
+      SCHEMATIC_SERVICE_ACCOUNT_CREDS: ${{ secrets.SCHEMATIC_SERVICE_ACCOUNT_CREDS }}
     steps:
       - env:
           CHANGED_MANIFESTS: ${{ needs.schema-convert.outputs.changed_manifests }}