consumers.py

class BalanceConsumer(AsyncWebsocketConsumer):
    async def connect(self):
        self.user = self.scope['user']
        if self.user.is_authenticated:
            # text_data = json.dumps({
            #         'message': '99999999'
            #     })
            self.user_name = str(self.user.username)

            await self.channel_layer.group_add(
                self.user_name,
                self.channel_name
            )
            print('пробуем выслать')
            await asyncio.sleep(5)
            await self.channel_layer.group_send(
                self.user_name,
                self.channel_name,
                {
                    'type': 'user_name',
                    'message': 'test'
                }
            )