curl --request POST \
  --url https://api.contribyard.com/v1/passkey_assertions/{id}/verify \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "assertion": {
    "type": "<string>",
    "id": "<string>",
    "rawId": "<string>",
    "authenticatorAttachment": "<string>",
    "response": {
      "clientDataJSON": "<string>"
    }
  }
}'

{
  "response": {
    "verified": true,
    "idtoken": "<string>"
  }
}