Generate hash

curl --request POST \
  --url https://services.commercengine.dev/api/v1/x2yh61zw4k/storefront/payments/generate-hash \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "payment_gateway": "payu",
  "plain_text": "<string>"
}'

{
  "message": "<string>",
  "success": true,
  "content": {
    "hash": "<string>"
  }
}