Reverse Engineering Instagram's Private API

I’m trying to reverse engineer Instagram Web’s Private API. I have successfully managed to login into Instagram using their login endpoint using man-in-the-middle proxy and postman. I now want to send and receive chat messages, but on looking at webpage’s javascript I think they use Mqtt over websockets, and I have managed to get some of their chat sending endpoints. But I don’t know how I can establish a connection with it or how I can reverse engineer their mqtt library which is highly obfuscated.Any help on deobfuscating their library would be helpful.Here is the library:https://gist.github.com/Atharva8/d2461713dfcaa2d8af9edf8123efcce0