Function validate

validate(
code: "FI_HETU" | "FI_YTUNNUS" | "FI_VAT" | ShortCode,
input: string,
): boolean
Validate a Finnish (FI) identity, business or VAT document.
Parameters
- code: "FI_HETU" | "FI_YTUNNUS" | "FI_VAT" | ShortCode
  Document type, either fully-qualified (FI_HETU, FI_YTUNNUS, FI_VAT) or short (HETU, YTUNNUS, Y, VAT, ALV).
- input: string
  Raw document string (formatting tolerated).
Returns boolean
true if the value passes FI-specific validation rules.
Example
```
import { validate } from "nationid/fi";
validate("FI_HETU", "131052-308T"); // true
validate("YTUNNUS", "1572860-0");
```
- Defined in countries/fi/index.ts:42