curl --request DELETE \
  --url 'https://api.permutive.app/cohorts-api/v2/cohorts/{cohortId}?k='

{
  "request_id": "b887517b-99a2-4ae0-bc32-93d1fb13d1b7",
  "error": {
    "type": "https://tools.ietf.org/html/rfc7231#section-6.5.1",
    "status_code": 400,
    "status": "Bad Request",
    "code": 1002,
    "message": "The provided request body was not structured as expected.",
    "docs": "https://developer.permutive.com/reference#errors"
  }
}