curl --request POST \
  --url https://api.dfns.io/auth/login \
  --header 'Content-Type: application/json' \
  --data '
{
  "challengeIdentifier": "<string>",
  "firstFactor": {
    "kind": "Fido2",
    "credentialAssertion": {
      "credId": "<string>",
      "clientData": "<string>",
      "signature": "<string>",
      "authenticatorData": "<string>",
      "algorithm": "<string>",
      "userHandle": "<string>"
    }
  },
  "secondFactor": {
    "kind": "Fido2",
    "credentialAssertion": {
      "credId": "<string>",
      "clientData": "<string>",
      "signature": "<string>",
      "authenticatorData": "<string>",
      "algorithm": "<string>",
      "userHandle": "<string>"
    }
  }
}
'

{
  "token": "<string>"
}