I am also a manager for channel “G.” I see that whenever I create an application for my own channel, it appears in channel “G” and vice-versa (along with App Name, Redirect URIs, Client ID, etc.).
My issue: when I use https://api.nightbot.tv/1/channel/send to post, the messages appear in my own channel but not in G’s. How can I specify the posts to appear in G’s channel?
You must follow the authorization flow as detailed here. You’ve already made an app, so step 1 is done. Now the owner of channel G must run the authorization URL in step 2; you can fill out the necessary query string parameters in the URL (in particular scope=channel_send) then send it to G to run. G will then be redirected to the specified redirect URL along with an authorization code, and assuming the redirect site handles step 4, you’ll then have the access token needed to post in G’s channel.