code: def read_welcome_message(self):
          '''Read the welcome message.
  
          Coroutine.
          '''
          reply = yield from self._control_stream.read_reply()
  
          self.raise_if_not_match(
              'Server ready', ReplyCodes.service_ready_for_new_user, replyf read_welcome_message(self):
          '''Read the welcome message.
  
          Coroutine.
          '''
          reply = yield from self._control_stream.read_reply()
  
          self.raise_if_not_match(
              'Server ready', ReplyCodes.service_ready_for_new_user, reply)
docs: Read the welcome message.
  
          Coroutine.