[Home](./index.md) > [@firebase/auth](./auth.md) > [UserMetadata](./auth.usermetadata.md) ## UserMetadata interface Interface representing a user's metadata. Signature: ```typescript export interface UserMetadata ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [creationTime?](./auth.usermetadata.creationtime.md) | string | (Optional) Time the user was created. | | [lastSignInTime?](./auth.usermetadata.lastsignintime.md) | string | (Optional) Time the user last signed in. |