voluptasmollitia/docs-exp/auth.autherror.phonenumber.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/auth](./auth.md) &gt; [AuthError](./auth.autherror.md) &gt; [phoneNumber](./auth.autherror.phonenumber.md)

## AuthError.phoneNumber property

The phone number of the user's account, used for sign-in/linking.

<b>Signature:</b>

```typescript
readonly phoneNumber?: string;
```