curl --request POST \
  --url https://public-api-demo.clearline.me/v2/pos/{posSystemId}/coupon/lookup \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json-patch+json' \
  --data '
{
  "posLocationId": "6orMqUyq2Hg3tP",
  "keyword": ""
}
'

{
  "data": {
    "coupons": [
      {
        "id": "<string>",
        "couponImage": "<string>",
        "name": "<string>",
        "title": "<string>",
        "subtitle": "<string>",
        "description": "<string>"
      }
    ]
  }
}