> ## Documentation Index
> Fetch the complete documentation index at: https://auth0.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Type Alias: MfaLoginFactorType

**MfaLoginFactorType** `push-notification | otp | sms | phone | voice | email | recovery-code | webauthn-roaming | webauthn-platform | duo`

Type definition for MFA login factor constants

```ts Example theme={null}
export type MfaLoginFactorType =
  | 'push-notification'
  | 'otp'
  | 'sms'
  | 'phone'
  | 'voice'
  | 'email'
  | 'recovery-code'
  | 'webauthn-roaming'
  | 'webauthn-platform'
  | 'duo';
```