EDIT: The only reason why I still had it at this point was because I could use it with other apps. However, now that my Spotify Subscription is cancelled, it doesn't work with anything. It's mildly infuriating because today, I can't still use it with other apps like I was able to yesterday.
Please don't make the same mistake I made. No one should buy this.
Google spotify premium mod apk and don’t use gmail to make an account, it should work
Why no gmail? XManager has been working well for me (Microsoft email) for a couple years now.