DirectPostJwt
OID4VP: The Response Mode direct_post.jwt causes the Wallet to send the Authorization Response using an HTTP POST request instead of redirecting back to the Verifier as defined in Section 8.2. The Wallet adds the response parameter containing the JWT as defined in Section 8.3 in the body of an HTTP POST request using theapplication/x-www-form-urlencoded content type. The names and values in the body MUST be encoded using UTF-8.