Groupcall C++

[Geliusan]

After reading the documentation, looking through all the examples and all the telegram clients, I still did not understand how to connect to a group call using c++. The tdlib library has a "joingroupcall" that requires the "audio_source_id" parameter, which is taken from tgcalls as written. How can I get it? Initially, I tried to organize a connection to a group call via python , but then I can’t get information about the group call and its participants in c ++ - I get an error that I’m not connected to the group chat. If anyone knows how to do this - write, I will be very grateful