code: def _x_secure_ok(self, response):
          
          args = AMQPWriter()
          args.write_longstr(response)
          self._send_method((10, 21), args)
docs: Security mechanism response
  
          This method attempts to authenticate, passing a block of SASL
          data for the security mechanism at the server side.
  
          PARAMETERS:
              response: longstr
  
                  security response data
  
                  A block of opaque data passed to the security
                  mechanism.  The contents of this data are defined by
                  the SASL security mechanism.