[Home](./index.md) > [@firebase/auth](./auth.md) > [unlink](./auth.unlink.md) ## unlink() function Unlinks a provider from a user account. Signature: ```typescript export declare function unlink(user: User, providerId: ProviderId): Promise; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | user | [User](./auth.user.md) | The user. | | providerId | [ProviderId](./auth.providerid.md) | The provider to unlink. | Returns: Promise<[User](./auth.user.md)>