code: def close(self):
          ''' terminate the connection '''
          cache_key = self._cache_key()
          SSH_CONNECTION_CACHE.pop(cache_key, None)
          SFTP_CONNECTION_CACHE.pop(cache_key, None)
          if self.sftp is not None:
              self.sftp.close()
          self.ssh.close(f close(self):
          ''' terminate the connection '''
          cache_key = self._cache_key()
          SSH_CONNECTION_CACHE.pop(cache_key, None)
          SFTP_CONNECTION_CACHE.pop(cache_key, None)
          if self.sftp is not None:
              self.sftp.close()
          self.ssh.close()
docs: terminate the connection