[admin]

My guess is someone hacked into yours or your mods streaming platform account.

First thing you should do is to change the password of your account.

Another thing I suggest is to go to following links and disconnect suspicious apps:
Twitch: https://www.twitch.tv/settings/connections
YouTube: https://myaccount.google.com/permissions
Mixer: https://mixer.com/mixer(hub:me/account/oauth)

In addition, I recommend that you report this issue to the streaming platform so they can take action on the hacker.