def cancel_backups(self):
self._client.post("<STR_LIT>".format(Instance.api_endpoint), model=self)<EOL>self.invalidate()<EOL>return True<EOL>
Cancels Backups for this Instance.  All existing Backups will be lost,
including any snapshots that have been taken.  This cannot be undone,
but Backups can be re-enabled at a later date.