(Music) Subscription already being used by a different Apple Account

I am trying to login to Apple Music and getting the popup that Subscription already being used by a different Apple Account. However how do I know what account that is? I used to have it, but now I cannot seem to get back into my account. Are you able to see where the subscription is being used? I logged into my account and see the devices, but I do not see Music listed as a subscription under my account.