curl --request POST \
  --url https://api.dfns.io/auth/credentials/code \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'X-DFNS-USERACTION: <api-key>' \
  --data '{
  "expiration": "2023-11-07T05:31:56Z"
}'

{
  "code": "<string>",
  "expiration": "<string>"
}