private void CheckPreferences() { string userName = string.Empty; string password = string.Empty; _sharedPreferencesService.CheckSharedPreferences(ref userName, ref password); if (userName == String.Empty || password == String.Empty) { //There is no saved credentials, take user to the login page ShowViewModel <SignInViewModel>(); } else { //There are saved credentials /*This is where you would query the database * * * * Done querying*/ if (userName == "admin" && password == "admin") { //Successful so take the user to application ShowViewModel <MainViewModel>(); } else { //Unsuccesful so take user to login screen //Clean SharedPreferences _sharedPreferencesService.CleanSharedPreferences(); ShowViewModel <SignInViewModel>(); } } }