voluptasmollitia/docs-exp/auth.updatecurrentuser.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/auth](./auth.md) &gt; [updateCurrentUser](./auth.updatecurrentuser.md)

## updateCurrentUser() function

Asynchronously sets the provided user as [Auth.currentUser](./auth.auth.currentuser.md) on the [Auth](./auth.auth.md) instance.

<b>Signature:</b>

```typescript
export declare function updateCurrentUser(auth: Auth, user: User | null): Promise<void>;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  auth | [Auth](./auth.auth.md) | The Auth instance. |
|  user | [User](./auth.user.md) \| null | The new [User](./auth.user.md)<!-- -->. |

<b>Returns:</b>

Promise&lt;void&gt;

## Remarks

A new instance copy of the user provided will be made and set as currentUser.

This will trigger [onAuthStateChanged()](./auth.onauthstatechanged.md) and [onIdTokenChanged()](./auth.onidtokenchanged.md) listeners like other sign in methods.

The operation fails with an error if the user to be updated belongs to a different Firebase project.