voluptasmollitia/docs-exp/auth.usercredential.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/auth](./auth.md) &gt; [UserCredential](./auth.usercredential.md)

## UserCredential interface

A structure containing a [User](./auth.user.md)<!-- -->, an [AuthCredential](./auth.authcredential.md)<!-- -->, the [OperationType](./auth.operationtype.md)<!-- -->, and any additional user information that was returned from the identity provider.

<b>Signature:</b>

```typescript
export interface UserCredential 
```

## Remarks

`operationType` could be [OperationType.SIGN\_IN](./auth.operationtype.sign_in.md) for a sign-in operation, [OperationType.LINK](./auth.operationtype.link.md) for a linking operation and [OperationType.REAUTHENTICATE](./auth.operationtype.reauthenticate.md) for a reauthentication operation.

## Properties

|  Property | Type | Description |
|  --- | --- | --- |
|  [operationType](./auth.usercredential.operationtype.md) | [OperationType](./auth.operationtype.md) | The type of operation which was used to authenticate the user (such as sign-in or link). |
|  [providerId](./auth.usercredential.providerid.md) | string \| null | The provider which was used to authenticate the user. |
|  [user](./auth.usercredential.user.md) | [User](./auth.user.md) | The user authenticated by this credential. |