quodolores/docs-exp/auth.phonemultifactorsignininfooptions.multifactoruid.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/auth](./auth.md) &gt; [PhoneMultiFactorSignInInfoOptions](./auth.phonemultifactorsignininfooptions.md) &gt; [multiFactorUid](./auth.phonemultifactorsignininfooptions.multifactoruid.md)

## PhoneMultiFactorSignInInfoOptions.multiFactorUid property

The uid of the second factor.

One of `multiFactorHint` or `multiFactorUid` is required.

<b>Signature:</b>

```typescript
multiFactorUid?: string;
```