function createPrivateKey
Usage in Deno
```typescript import { createPrivateKey } from "node:node__crypto.d.ts"; ```
createPrivateKey(key: ): KeyObject
Creates and returns a new key object containing a private key. If `key` is a
string or `Buffer`, `format` is assumed to be `'pem'`; otherwise, `key` must be an object with the properties described above.
If the private key is encrypted, a `passphrase` must be specified. The length
of the passphrase is limited to 1024 bytes.