# ChallengeType

The challenge type reported in [`ActionResultOptions`](/sdk-ref/platform/interfaces/actionresultoptions).

## Members

| Member | Value | Description |
|  --- | --- | --- |
| `sms_otp` | `"sms_otp"` | SMS one-time password |
| `email_otp` | `"email_otp"` | Email one-time password |
| `totp` | `"totp"` | Time-based one-time password |
| `push_otp` | `"push_otp"` | Push-based one-time password |
| `voice_otp` | `"voice_otp"` | Voice one-time password |
| `idv` | `"idv"` | Identity verification |
| `captcha` | `"captcha"` | CAPTCHA challenge |
| `password` | `"password"` | Password challenge |
| `passkey` | `"passkey"` | Passkey challenge |