[Home](./index.md) > [@firebase/auth](./auth.md) > [getAdditionalUserInfo](./auth.getadditionaluserinfo.md) ## getAdditionalUserInfo() function Extracts provider specific [AdditionalUserInfo](./auth.additionaluserinfo.md) for the given credential. Signature: ```typescript export declare function getAdditionalUserInfo(userCredential: UserCredential): AdditionalUserInfo | null; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | userCredential | [UserCredential](./auth.usercredential.md) | The user credential. | Returns: [AdditionalUserInfo](./auth.additionaluserinfo.md) \| null