IssueTracker

The kotlin example for implement custom back navigation is not right. OnBackPressedCallback is an Abstract Class and not an interface. therefore, it requires its constructor to be called and its abstract methods to be implemented. Here are two suggestions that could be used as example:

1.
    val callback = requireActivity().onBackPressedDispatcher.addCallback(object : OnBackPressedCallback(true) {
        override fun handleOnBackPressed() {
            patientsActivity.moveToLoginScreen(true)
        }
    })

2.
    val onBackPressedCallback = object : OnBackPressedCallback(true) {
        override fun handleOnBackPressed() {
            patientsActivity.moveToLoginScreen(true)
        }
    }
    val callback = requireActivity().onBackPressedDispatcher.addCallback(onBackPressedCallback)

https://developer.android.com/guide/navigation/navigation-custom-back#implement_custom_back_navigation