from parallel import Parallel

client = Parallel(api_key="API Key")

run = client.beta.findall.cancel(
    findall_id="findall_56ccc4d188fb41a0803a935cf485c774",
)

print(f"FindAll run {run.findall_id} cancelled: {run.model_dump_json(indent=2)}")

{
  "type": "error",
  "error": {
    "ref_id": "fcb2b4f3-c75e-4186-87bc-caa1a8381331",
    "message": "FindAll run not found"
  }
}