[Home](./index.md) > [@firebase/auth](./auth.md) > [reauthenticateWithPopup](./auth.reauthenticatewithpopup.md)
## reauthenticateWithPopup() function
Reauthenticates the current user with the specified [OAuthProvider](./auth.oauthprovider.md) using a pop-up based OAuth flow.
Signature:
```typescript
export declare function reauthenticateWithPopup(user: User, provider: AuthProvider, resolver?: PopupRedirectResolver): Promise;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| user | [User](./auth.user.md) | The user. |
| provider | [AuthProvider](./auth.authprovider.md) | The provider to authenticate. The provider has to be an [OAuthProvider](./auth.oauthprovider.md). Non-OAuth providers like [EmailAuthProvider](./auth.emailauthprovider.md) will throw an error. |
| resolver | [PopupRedirectResolver](./auth.popupredirectresolver.md) | An instance of [PopupRedirectResolver](./auth.popupredirectresolver.md), optional if already supplied to [initializeAuth()](./auth.initializeauth.md) or provided by [getAuth()](./auth.getauth.md). |
Returns:
Promise<[UserCredential](./auth.usercredential.md)>
## Remarks
If the reauthentication is successful, the returned result will contain the user and the provider's credential.
## Example
```javascript
// Sign in using a popup.
const provider = new FacebookAuthProvider();
const result = await signInWithPopup(auth, provider);
// Reauthenticate using a popup.
await reauthenticateWithPopup(result.user, provider);
```