The `legacy:legacyListCases` API endpoint used in [case.get_cases](https://github.com/google/secops-wrapper/blob/e2d32f30f7f7583649847702717edb3e8b654b49/src/secops/chronicle/case.py#L23) does not exist. The v1alpha `cases.list` method looks like the correct one to use: https://cloud.google.com/chronicle/docs/reference/rest/v1alpha/projects.locations.instances.cases/list.