code: def cancel(self, subscription_id, data={}, **kwargs):
          
          url = "{}/{}/cancel".format(self.base_url, subscription_id)
          return self.post_url(url, data, **kwargs)
docs: Cancel subscription given by subscription_id
  
          Args:
              subscription_id : Id for which subscription has to be cancelled
  
          Returns:
              Subscription Dict for given subscription id