> For the complete documentation index, see [llms.txt](https://sdk.venly.io/sdk-reference/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sdk.venly.io/sdk-reference/ue5-sdk-v3/function-references/wallet/user/updateuserreference.md).

# UpdateUserReference

Updates the reference identifier for a specific user based on the user `UUID`. The reference is a custom identifier that can be used to link users to external systems.

{% code overflow="wrap" %}

```cpp
void UpdateUserReference(FString UserId, const FVyUpdateUserReferenceRequest& Params, const FVyOnUpdateUserReferenceComplete& OnComplete) const;
```

{% endcode %}

\
**Parameters**

| UserId     | FString                                                                                                              | The user \`UUID\` whose \*\*reference\*\* you want to update.                           |
| ---------- | -------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------- |
| Params     | [FVyUpdateUserReferenceRequest](/sdk-reference/ue5-sdk-v3/object-references/wallet/fvyupdateuserreferencerequest.md) | Parameters for this operation (FVyUpdateUserReferenceRequest)                           |
| OnComplete | FVyOnUpdateUserReferenceComplete                                                                                     | The callback function called when the user preferences retrieval operation is complete. |

\
**OnComplete Callback** (FVyOnUpdateUserReferenceComplete)\
Contains a [FVyUserReferenceDto](/sdk-reference/ue5-sdk-v3/object-references/wallet/fvyuserreferencedto.md) response type