[Home](./index.md) > [@firebase/auth-types](./auth-types.md) > [UserCredential](./auth-types.usercredential.md) > [operationType](./auth-types.usercredential.operationtype.md) ## UserCredential.operationType property The type of operation which was used to authenticate the user (such as sign-in or link). Signature: ```typescript operationType: OperationType; ```