private void MBtnSignOut_Click(object sender, EventArgs e)
{
Toast.MakeText(this, $"Signing out User - {fireBaseManager.mAuth?.CurrentUser}", ToastLength.Short).Show();
fireBaseManager.SignOutUser();
if (fireBaseManager.mAuth?.CurrentUser == null)
{
Toast.MakeText(this, $"Signing out Successfull.", ToastLength.Short).Show();
Finish();
}
}