- Copy the app to the new account.
- Log back in to the old account and change the url on the old app to some obscure name,.
- Quickly log into the new account and change the url for the new app to what you had for the existing url.
As I understand it, this should appear relatively seamless to the user and they shouldn’t have to log back in, but I haven’t tried it myself. Not sure what would happen if a user is actively using the app at that moment. It may be best to do it at a time when you know very few users are using the app.