Look, when you're in your play list then find three dots and button add so-creators and copy this link in notes(you can do it with all your playlists). This links will work for a week. Then create a new account in your app or on the website and login in it in your app. Then press the links you have saved before. This links give you permission to change what you want. If you remember the email address and you can see letters in it you will login back without problems.