List knowledge documents

{
  "data": [
    {
      "character_count": 0,
      "created_at": "2019-08-24T14:15:22Z",
      "error_message": "string",
      "file_name": "string",
      "file_size_bytes": 0,
      "id": "string",
      "is_enabled": true,
      "last_checked_at": "2019-08-24T14:15:22Z",
      "last_synced_at": "2019-08-24T14:15:22Z",
      "name": "string",
      "next_refresh_at": "2019-08-24T14:15:22Z",
      "object": "knowledge_document",
      "refresh_error_message": "string",
      "refresh_interval_hours": 0,
      "refresh_status": "idle",
      "source_type": "file",
      "source_url": "http://example.com",
      "status": "processing",
      "updated_at": "2019-08-24T14:15:22Z"
    }
  ],
  "has_more": true,
  "next_cursor": "string",
  "object": "list"
}

{
  "message": "limit must be an integer between 1 and 100.",
  "name": "bad_request"
}

{
  "message": "The supplied API key is invalid or revoked.",
  "name": "unauthorized"
}

{
  "message": "This API key does not have the required knowledge:read permission.",
  "name": "insufficient_scope"
}

{
  "message": "Too many requests. Please try again later.",
  "name": "rate_limited"
}

{
  "message": "Internal server error.",
  "name": "internal_server_error"
}

{
  "message": "The API is temporarily unavailable.",
  "name": "service_unavailable"
}