Finish Passkey Mediation

curl --request POST \
  --url https://{projectId}.frontendapi.corbado.io/v2/auth/passkey/mediation/finish \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "signedChallenge": "<string>"
}'

{
  "blockBody": {
    "block": "signup-init",
    "authType": "signup",
    "data": {
      "blockType": "<string>",
      "challenge": "<string>",
      "identifierValue": "<string>",
      "identifierType": "email",
      "autoSubmit": true,
      "passkeyIconSet": "default",
      "variant": "default"
    },
    "alternatives": [
      {}
    ],
    "error": {
      "code": "<string>",
      "message": "<string>"
    },
    "continueOnOtherDevice": {
      "reason": "email-link-verified"
    }
  },
  "common": {
    "appName": "<string>",
    "frontendApiUrl": "<string>",
    "hideBadge": true,
    "environment": "<string>"
  },
  "newProcess": {
    "token": "<string>",
    "expiresAt": 123
  }
}