> ## Documentation Index
> Fetch the complete documentation index at: https://docs-dev-docs-event-stream-action-templates.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.
# MfaWebAuthnRoamingChallenge
> Describes all the properties and methods available to customize the Universal Login `mfa-webauthn-roaming-challenge` screen.
The MfaWebAuthnRoamingChallenge class implements the `mfa-webauthn-roaming-challenge` screen functionality. This screen is displayed when the user needs to verify their identity using a roaming authenticator, such as a security key.
## Constructors
Create an instance of MFA WebAuthn Roaming Challenge screen manager:
```typescript Example theme={null}
import MfaWebAuthnRoamingChallenge from '@auth0/auth0-acul-js/mfa-webauthn-roaming-challenge';
const mfaWebAuthnRoamingChallenge = new MfaWebAuthnRoamingChallenge();
await mfaWebAuthnRoamingChallenge.verify();
```
## Properties
BrandingMembers}>
Provides branding-related configurations, such as branding theme and settings.
ClientMembers}>
Provides client-related configurations, such as `id`, `name`, and `logoUrl`, for the `mfa-webauthn-roaming-challenge` screen.
OrganizationMembers}>
Provides information about the user's Organization, such as `id` and `name`.
PromptMembers}>
Contains data about the current prompt in the authentication flow.
ScreenMembersOnMfaWebAuthnRoamingChallenge}>
Contains details specific to the `mfa-webauthn-roaming-challenge` screen, including its configuration and context.
TenantMembers}>
Contains data related to the tenant, such as `id` and associated metadata.
TransactionMembers}>
Provides transaction-specific data for the `mfa-webauthn-roaming-challenge` screen, such as active identifiers and flow states.
UntrustedDataMembers}>
Handles untrusted data passed to the SDK, such as user input during MFA WebAuthn roaming challenge.
UserMembers}>
Details of the active user, including `username`, `email`, and `roles`.
## Methods
This method changes the display language of the Universal Login page.
```typescript Example theme={null}
import MfaWebAuthnRoamingChallenge from '@auth0/auth0-acul-js/mfa-webauthn-roaming-challenge';
const mfaWebAuthnRoamingChallenge = new MfaWebAuthnRoamingChallenge();
mfaWebAuthnRoamingChallenge.changeLanguage({
language: 'fr',
});
```
**Method Parameters**
[LanguageChangeOptions](/docs/libraries/acul/js-sdk/Screens/interfaces/LanguageChangeOptions).
The locale code for the desired language (for example, `'en'`, `'fr'`, `'es'`).
When set to `'session'`, the selected language persists for the duration of the session.
Error[]}>
This method retrieves the array of transaction errors from the context, or an empty array if none exist.
This method reports a WebAuthn API error encountered during the `navigator.credentials.get()` operation.
```typescript Example theme={null}
import MfaWebAuthnRoamingChallenge from '@auth0/auth0-acul-js/mfa-webauthn-roaming-challenge';
const mfaWebAuthnRoamingChallenge = new MfaWebAuthnRoamingChallenge();
await mfaWebAuthnRoamingChallenge.reportWebAuthnError({
error: { name: 'NotAllowedError', message: 'The operation was not allowed.' },
});
```
**Method Parameters**
[MfaWebAuthnRoamingChallengeReportErrorOptions](/docs/libraries/acul/js-sdk/Screens/interfaces/MfaWebAuthnRoamingChallengeReportErrorOptions).
WebAuthnErrorDetails} required>
The error object from the WebAuthn API (`navigator.credentials.get()`) to be reported.
The name of the error (e.g., `'NotAllowedError'`).
The error message describing what went wrong.
This method allows the user to try another MFA method.
```typescript Example theme={null}
import MfaWebAuthnRoamingChallenge from '@auth0/auth0-acul-js/mfa-webauthn-roaming-challenge';
const mfaWebAuthnRoamingChallenge = new MfaWebAuthnRoamingChallenge();
await mfaWebAuthnRoamingChallenge.tryAnotherMethod();
```
This method initiates the WebAuthn challenge using the security key.
```typescript Example theme={null}
import MfaWebAuthnRoamingChallenge from '@auth0/auth0-acul-js/mfa-webauthn-roaming-challenge';
const mfaWebAuthnRoamingChallenge = new MfaWebAuthnRoamingChallenge();
await mfaWebAuthnRoamingChallenge.verify();
```
**Method Parameters**
[CustomOptions](/docs/libraries/acul/js-sdk/Screens/interfaces/CustomOptions).
When `true`, remembers the browser for future MFA challenges. Only applicable if `screen.showRememberDevice` is `true`.