List visitors

{
  "data": [
    {
      "id": "clxyvwr1234567890",
      "object": "visitor",
      "email": "jane@acme.com",
      "verified": true,
      "dataroom_id": "string",
      "invited_at": "2019-08-24T14:15:22Z",
      "total_views": 14,
      "last_viewed_at": "2019-08-24T14:15:22Z",
      "created": "2019-08-24T14:15:22Z",
      "updated_at": "2019-08-24T14:15:22Z"
    }
  ],
  "next_cursor": "string"
}

{
  "error": {
    "code": "bad_request",
    "message": "The request body is not valid JSON.",
    "doc_url": "https://www.papermark.com/docs/api/errors#bad_request",
    "details": null
  }
}

{
  "error": {
    "code": "unauthorized",
    "message": "Missing bearer token. Include an `Authorization: Bearer <token>` header.",
    "doc_url": "https://www.papermark.com/docs/api/errors#unauthorized",
    "details": null
  }
}

{
  "error": {
    "code": "forbidden",
    "message": "Token is missing required scope: links.write.",
    "doc_url": "https://www.papermark.com/docs/api/errors#forbidden",
    "details": null
  }
}

{
  "error": {
    "code": "not_found",
    "message": "Link link_abcd1234 not found.",
    "doc_url": "https://www.papermark.com/docs/api/errors#not_found",
    "details": null
  }
}

{
  "error": {
    "code": "unprocessable_entity",
    "message": "Invalid request body.",
    "doc_url": "https://www.papermark.com/docs/api/errors#unprocessable_entity",
    "details": {
      "formErrors": [],
      "fieldErrors": {
        "expires_at": [
          "Invalid datetime"
        ]
      }
    }
  }
}

{
  "error": {
    "code": "rate_limit_exceeded",
    "message": "Rate limit exceeded. Try again in 30s.",
    "doc_url": "https://www.papermark.com/docs/api/errors#rate_limit_exceeded",
    "details": null
  }
}