curl --request POST \
  --url https://{projectId}.frontendapi.corbado.io/v2/auth/passkey/login/start \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "clientInformation": {
    "bluetoothAvailable": true,
    "clientEnvHandle": "<string>",
    "visitorId": "<string>",
    "canUsePasskeys": true,
    "isUserVerifyingPlatformAuthenticatorAvailable": true,
    "isConditionalMediationAvailable": true,
    "clientCapabilities": {
      "conditionalCreate": true,
      "conditionalMediation": true,
      "conditionalGet": true,
      "hybridTransport": true,
      "passkeyPlatformAuthenticator": true,
      "userVerifyingPlatformAuthenticator": true,
      "relatedOrigins": true,
      "signalAllAcceptedCredentials": true,
      "signalCurrentUserDetails": true,
      "signalUnknownCredential": true
    },
    "javaScriptHighEntropy": {
      "platform": "<string>",
      "platformVersion": "<string>",
      "mobile": true
    },
    "isNative": true,
    "webdriver": true,
    "privateMode": true,
    "clientEnvHandleMeta": {
      "ts": 123,
      "source": "ls"
    },
    "nativeMeta": {
      "platform": "<string>",
      "platformVersion": "<string>",
      "displayName": "<string>",
      "name": "<string>",
      "version": "<string>",
      "build": "<string>",
      "deviceOwnerAuth": "none",
      "isBluetoothAvailable": true,
      "isBluetoothOn": true,
      "isGooglePlayServices": true,
      "isDeviceSecure": true,
      "error": "<string>",
      "brand": "<string>",
      "model": "<string>",
      "locale": "<string>",
      "screen": {
        "widthPoints": 123,
        "heightPoints": 123,
        "scale": 123
      },
      "sdkInitTimeMs": 123
    }
  }
}
'

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