I am trying to get my bot to message two people but in the same chat window (like when you add a friend to a conversation). The only thing I've found is how to send to a single person by doing <client>.send(message); How could I add a second person to that conversation?
Any examples would be highly appreciated.
Discord.js doesn't really implement that because in Discord bots can't join Group DMs. You would need a self-bot (a bot that runs on a user account), but Discord doesn't want them to be used, so discord.js didn't make this options.
Therefore, at the moment there's no way to do that: the groupDMChannel class can't be used to create them, and since there's no method to do that from the client or from a DM channel I think you're stuck there :\