# The Backend AllowlistIdentifier object

The Backend `AllowlistIdentifier` object represents an identifier that has been added to the allowlist of your application. The Backend `AllowlistIdentifier` object is used in the [Backend API](https://clerk.com/docs/reference/backend-api/model/AllowlistIdentifier) and is not directly accessible from the Frontend API.

## Properties

| Property                                     | Type                                                          | Description                                                       |
| -------------------------------------------- | ------------------------------------------------------------- | ----------------------------------------------------------------- |
| <a id="createdat"></a> `createdAt`           | `number`                                                      | The date when the allowlist identifier was first created.         |
| <a id="id"></a> `id`                         | `string`                                                      | A unique ID for the allowlist identifier.                         |
| <a id="identifier"></a> `identifier`         | `string`                                                      | The identifier that was added to the allowlist.                   |
| <a id="identifiertype"></a> `identifierType` | `"email_address" | "phone_number" | "web3_wallet"` | The type of the allowlist identifier.                             |
| <a id="instanceid"></a> `instanceId?`        | `string`                                                      | The ID of the instance that this allowlist identifier belongs to. |
| <a id="invitationid"></a> `invitationId?`    | `string`                                                      | The ID of the invitation sent to the identifier.                  |
| <a id="updatedat"></a> `updatedAt`           | `number`                                                      | The date when the allowlist identifier was last updated.          |

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