curl --request POST \
  --url https://docflow.textin.com/api/app-api/sip/platform/v2/category/fields/add \
  --header 'Content-Type: application/json' \
  --header 'x-ti-app-id: <api-key>' \
  --header 'x-ti-secret-code: <api-key>' \
  --data '
{
  "name": "Invoice Code",
  "workspace_id": "1234567890",
  "category_id": "1234567890",
  "description": "Invoice code description",
  "prompt": "<string>",
  "use_prompt": true,
  "alias": [
    "<string>"
  ],
  "identity": "<string>",
  "multi_value": true,
  "duplicate_value_distinct": true,
  "transform_settings": {
    "type": "datetime",
    "datetime_settings": {
      "format": "yyyy-MM-dd HH:mm:ss"
    },
    "enumerate_settings": {
      "items": [
        "<string>"
      ]
    },
    "regex_settings": {
      "match": "^\\d{4}-\\d{2}-\\d{2}$",
      "replace": "$1-$2-$3"
    },
    "mismatch_action": {
      "mode": "default",
      "default_value": "<string>"
    }
  },
  "table_id": "1234567890"
}
'

{
  "code": 200,
  "msg": "<string>",
  "result": {
    "field_id": "1234567890"
  }
}