voluptasmollitia/docs-exp/auth.additionaluserinfo.isnewuser.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/auth](./auth.md) &gt; [AdditionalUserInfo](./auth.additionaluserinfo.md) &gt; [isNewUser](./auth.additionaluserinfo.isnewuser.md)

## AdditionalUserInfo.isNewUser property

Whether the user is new (created via sign-up) or existing (authenticated using sign-in).

<b>Signature:</b>

```typescript
readonly isNewUser: boolean;
```