Turn WebSockets into Async/Await Requests (AWS WebSocket API Gateway + Lambda)

Some time ago, I was building a chat application using AWS Websocket API gateway. Things were going smoothly. I created a WebSocket API Gateway, added $connect, $disconnect, and sendMessage/addGroup routes. From the frontend (React) side, everything was fire-and-forget. You send a message, and the onMessageHandler takes care of it 💪🏼 But then a new requirement of uploading files using S3 signed URLs came up. That's where I needed the Async/Await promise pattern. Now, one option was to create a