Save File

If you're in LocalSave mode, each user data will be saved locally on your PC. You can find the save file inside Unity's persistantDataPath folder. Each OS has a different path, so check here to know where:

https://docs.unity3d.com/ScriptReference/Application-persistentDataPath.html

Inside the folder, you will find a save file for each user you created. You can delete one to reset the user.