List discount codes

{
  "data": [
    {
      "id": "497f6eca-6276-4993-bfeb-53cbbbba6f08",
      "code": "LAUNCH20",
      "name": "string",
      "value_type": "percent",
      "percent_off": 0,
      "amount_off_cents": 0,
      "currency": "string",
      "duration": "once",
      "duration_months": 0,
      "use_limit": 0,
      "min_spend_cents": 0,
      "max_spend_cents": 0,
      "starts_at": "2019-08-24T14:15:22Z",
      "expires_at": "2019-08-24T14:15:22Z",
      "is_active": true,
      "tier_ids": [
        "string"
      ],
      "members": [
        {
          "platform": "string",
          "platform_uid": "string",
          "username": "string"
        }
      ],
      "redeemed_count": 0,
      "pending_count": 0,
      "created_at": "2019-08-24T14:15:22Z"
    }
  ]
}

{
  "type": "https://docs.arcalotl.com/api/errors#unauthorized",
  "title": "Unauthorized",
  "status": 401,
  "detail": "A valid API key is required. Provide it as 'Authorization: Bearer arclt_live_...'.",
  "code": "unauthorized"
}

{
  "type": "https://docs.arcalotl.com/api/errors#missing_scope",
  "title": "Forbidden",
  "status": 403,
  "detail": "This API key is missing the required scope: subscriptions:read.",
  "code": "missing_scope"
}

{
  "type": "https://docs.arcalotl.com/api/errors#rate_limited",
  "title": "Too Many Requests",
  "status": 429,
  "detail": "Rate limit exceeded. Retry after the interval in the Retry-After header.",
  "code": "rate_limited"
}