Unregistered VCS root detected The directory /Users/*****/AndroidStudioProjects/Signin/google-services is under Git, but is not registered in the Settings.
If you see this message whenever you open Android Studio and create a new project, It's because your projects home directory is set as a VCS root. Maybe It was a mistake, set by you unintentionally. That was my case.
Just delete .git directory from projects home directory.