Trouble with Authentication

Struggling to understand why the querystring works but the auth parameter does not (it is not sent at all).

Querystring Code
```cpp
    client.connect(uri, {{"token", token}});
```

Auth Code:
```cpp
     sio::message::ptr auth = sio::object_message::create();
     auth->get_map()["token"] = sio::string_message::create(token);
     
     client.connect(uri, auth);
```