curl --request POST \
  --url https://backendapi.corbado.io/v2/passkey/append/finish \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "userID": "<string>",
  "processID": "<string>",
  "attestationResponse": "{\"type\":\"public-key\",\"id\":\"JM6...J_Q\",\"rawId\":\"JM6...J_Q\",\"authenticatorAttachment\":null,\"response\":{\"clientDataJSON\":\"eyJ...ZX0\",\"authenticatorData\":\"SZY...AAQ\",\"signature\":\"Ni7...YAg\",\"userHandle\":\"dXN...zk5\"},\"clientExtensionResults\":{}}",
  "clientInformation": {
    "remoteAddress": "::ffff:172.18.0.1",
    "userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36",
    "userVerifyingPlatformAuthenticatorAvailable": true,
    "conditionalMediationAvailable": true,
    "clientCapabilities": {
      "conditionalCreate": true,
      "conditionalMediation": true,
      "hybridTransport": true,
      "passkeyPlatformAuthenticator": true,
      "userVerifyingPlatformAuthenticator": true
    },
    "parsedDeviceInfo": {
      "browserName": "<string>",
      "browserVersion": "<string>",
      "osName": "<string>",
      "osVersion": "<string>"
    },
    "clientEnvHandle": "<string>",
    "javascriptFingerprint": "<string>",
    "bluetoothAvailable": true,
    "passwordManagerAvailable": true,
    "privateMode": true
  },
  "trackingID": "<string>",
  "sendNotification": true
}
'

{
  "passkeyData": {
    "id": "<string>",
    "userID": "<string>",
    "username": "<string>",
    "challengeID": "<string>",
    "aaguidDetails": {
      "aaguid": "<string>",
      "name": "<string>",
      "iconLight": "<string>",
      "iconDark": "<string>"
    }
  }
}