curl --request GET \
  --url https://rest.compute.cudo.org/v1/billing-accounts/{id}:list-permissions \
  --header 'Authorization: <api-key>'

{
  "permissions": [
    {
      "permissionRole": "UNKNOWN",
      "role": "<string>",
      "userEmail": "<string>",
      "userId": "<string>",
      "userPicture": "<string>"
    }
  ]
}