code: def CreateAttachment(self, document_link, attachment, options=None):
          
          if options is None:
              options = {}
  
          document_id, path = self._GetItemIdWithPathForAttachment(attachment, document_link)
          return self.Create(attachment,
                             path,
                             'attachments',
                             document_id,
                             None,
                             options)
docs: Creates an attachment in a document.
  
          :param str document_link:
              The link to the document.
          :param dict attachment:
              The Azure Cosmos attachment to create.
          :param dict options:
              The request options for the request.
  
          :return:
              The created Attachment.
          :rtype:
              dict