curl --request POST \
  --url https://backendapi.corbado.io/v2/users/{userID}/challenges \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '{
  "challengeType": "email_otp",
  "identifierValue": "jane@doe.com",
  "challengeMetadata": {
    "city": "Munich"
  },
  "lifetimeSeconds": 300,
  "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",
    "clientEnvHandle": "<string>",
    "javascriptFingerprint": "<string>",
    "javaScriptHighEntropy": {
      "platform": "<string>",
      "platformVersion": "<string>",
      "mobile": true
    },
    "bluetoothAvailable": true,
    "passwordManagerAvailable": true,
    "userVerifyingPlatformAuthenticatorAvailable": true,
    "conditionalMediationAvailable": true,
    "privateMode": true,
    "parsedDeviceInfo": {
      "browserName": "<string>",
      "browserVersion": "<string>",
      "osName": "<string>",
      "osVersion": "<string>"
    },
    "nativeMeta": {
      "build": "<string>",
      "deviceOwnerAuth": "<string>",
      "isPlatformAuthenticatorAPISupported": true,
      "isBluetoothAvailable": true,
      "isBluetoothOn": true,
      "googlePlayServices": true,
      "deviceSecure": true
    }
  }
}'

{
  "challengeID": "<string>",
  "type": "email_otp",
  "identifierValue": "<string>",
  "value": "<string>",
  "expires": 123,
  "status": "pending"
}