Encountering Error 401 while accessing AR Interface table using API

We are try to access AR Interface table using the APIs. Encountering above issues.

Appreciate resolution.

APIs

Get all AutoInvoice interface lines

Method: GET

Path: /fscmRestApi/resources/11.13.18.05/autoInvoiceInterfaceLines

Get an AutoInvoice interface line

Method: GET

Path: /fscmRestApi/resources/11.13.18.05/autoInvoiceInterfaceLines/{InterfaceLineGUID}

Update an AutoInvoice interface line

Method: PATCH

Path: /fscmRestApi/resources/11.13.18.05/autoInvoiceInterfaceLines/{InterfaceLineGUID}