Login details leak notification from Avast

Hi, I received notification/warnings that my login details had been leaked on Zynga but I have never accessed or used Zynga and nor do I ever download or play games online or inApps (including Zynga) as I am totally uninterested , so I’m mystified as to how this has occured. Any thoughts? Im wondering if at some point I was hacked (?) and the hacker signed me up to use Zynga? I have no idea??

Avast Hack-Check: https://www.avast.com/hackcheck

Hi, if you received this type of notification then it would indicate that your email address was discovered in some leaked database. It is therefore possible that someone could have used your data to sign up to Zynga.