* enable setting environment variables on the function ([a728822](https://gitlab.developers.cam.ac.uk/uis/devops/infra/terraform/gcp-scheduled-script/commit/a728822ad941c3b46ab16520fb19fcc470a7aeeb))
* empty tuple when using a custom service account ([60da3d2](https://gitlab.developers.cam.ac.uk/uis/devops/infra/terraform/gcp-scheduled-script/commit/60da3d2081d487b257d012ffcf2141336834f12d))