curl --request POST \
  --url https://api.bkey.id/v1/vault/access \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "itemName": "<string>",
  "fieldPath": "<string>",
  "purpose": "<string>",
  "ephemeralPublicKey": "<string>",
  "expiresInSecs": 120
}
'

{
  "id": "<string>",
  "status": "<string>",
  "challengeHex": "<string>",
  "ephemeralPublicKey": "<string>",
  "expiresAt": "2023-11-07T05:31:56Z",
  "createdAt": "2023-11-07T05:31:56Z"
}