If you are a Twitch.tv user, your email address and hashed passwords were stolen, along with any other private information you submitted to the site.
If you used the same email and password to register to the mIRC.com forums, please take this moment to change your password now.
https://forums.mirc.com/ubbthreads.php/ubb/editbasic Even though the passwords that were stolen from Twitch.tv are cryptographically hashed, it is possible for hackers to decipher them with enough time.
https://www.google.com/search?q=twitch+hacked