If you have several Smule accounts, e.g. one for yourself and one for your group, you might want to switch between these different accounts.
Unfortunately, there is currently no built-in way to do this. You need to delete the app, reinstall it and then log in with the other account. That’s the only way to switch user accounts in the app.
If you don’t need to open songs and just want to create and edit another account or leave comments with it, you can also login on the Smule website with your other accounts.