# UpdateUserReference

### Description

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" %}

```csharp
public static VyTask<VyUserReferenceDto> UpdateUserReference(string userId, VyUpdateUserReferenceRequest reqParams)
```

{% endcode %}

{% tabs %}
{% tab title="Details" %}
**Parameters**

| userId    | string                                                                                                           | The user \`UUID\` whose \*\*reference\*\* you want to update. |
| --------- | ---------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------- |
| reqParams | [VyUpdateUserReferenceRequest](/sdk-reference/c-sdk-v3/object-references/wallet/vyupdateuserreferencerequest.md) | Request data for the operation                                |

**Returns**

VyTask<[VyUserReferenceDto](/sdk-reference/c-sdk-v3/object-references/wallet/vyuserreferencedto.md)>\
User's reference updated successfully.
{% endtab %}
{% endtabs %}


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