This little C++ program tries to find the Twitch accounts of a live game of the desired summoner. Use like ./finder <summoner_name> (in quotes if with spaces).
Clone the repository. Change the riot_api_key and the twitch_client_id in finder.cpp (my riot key regenerates every 24 hours, so better you have your own Riot and Twitch API keys).
https://developer.riotgames.com/, https://dev.twitch.tv/
Then g++ finder.cpp -o finder -lcurl -ljsoncpp
libcurl, jsoncpp