@Knoober there are two existing solutions to this problem. You can call http://tmi.twitch.tv/group/user/channel/chatters which includes the list of moderators for a channel (but also a list of all other chatters in that channel) or you can send .mods to the channel that you are in and simply listen to the “The moderators of this room…” message.
One note about the latter Method: You need to be in TWITCHCLIENT 3 mode to be able to identify which channel the message with the moderators is sent to. Otherwise it will be PRIVMSG’d to your bot directly instead of to the channel.