List required verification documents

Example response

{
  "account_id": "2VZvtmVc2j3gQ80CTlcuQXbGrwC",
  "available_person_labels": [
    "Jane Doe"
  ],
  "documents": [
    {
      "display_name": "Government-issued photo ID",
      "person_label": "Jane Doe"
    }
  ]
}