code: def attributes(self, resource_id=None):
          
          resource = self.copy()
          resource._request_entity = 'attribute'
          resource._request_uri = '{}/attributes'.format(resource._request_uri)
          if resource_id is not None:
              resource._request_uri = '{}/{}'.format(resource._request_uri, resource_id)
          return resource
docs: Attribute endpoint for this resource with optional attribute id.
  
          This method will set the resource endpoint for working with Attributes.
          The HTTP GET method will return all attributes applied to this resource
          or if a resource id (attribute id) is provided it will return the
          provided attribute if exists on this resource. An attribute can be added
          to this resource using the HTTP POST method and passing a JSON body
          containing the attribute type and attribute value. Using the HTTP PUT
          method with a provided resource id an attribute can be updated. The
          HTTP DELETE method will remove the provided attribute from this
          resource.
  
          **Example Endpoints URI's**
  
          +--------------+--------------------------------------------------------------+
          | HTTP Method  | API Endpoint URI's                                           |
          +==============+==============================================================+
          | GET          | /v2/groups/{resourceType}/{uniqueId}/attributes              |
          +--------------+--------------------------------------------------------------+
          | GET          | /v2/groups/{resourceType}/{uniqueId}/attributes/{resourceId} |
          +--------------+--------------------------------------------------------------+
          | DELETE       | /v2/groups/{resourceType}/{uniqueId}/attributes/{resourceId} |
          +--------------+--------------------------------------------------------------+
          | POST         | /v2/groups/{resourceType}/{uniqueId}/attributes              |
          +--------------+--------------------------------------------------------------+
          | PUT          | /v2/groups/{resourceType}/{uniqueId}/attributes/{resourceId} |
          +--------------+--------------------------------------------------------------+
  
          Args:
              resource_id (Optional [string]): The resource id (attribute id).