private void FocusSetup()
        {
            EmailEntryXaml.Completed += (s, e) =>
            {
                PasswordEntryXaml.Focus();
            };

            PasswordEntryXaml.Completed += (s, e) =>
            {
                FirstnameEntryXaml.Focus();
            };

            FirstnameEntryXaml.Completed += (s, e) =>
            {
                LastnameEntryXaml.Focus();
            };

            LastnameEntryXaml.Completed += (s, e) =>
            {
                RegisterButtonXaml.Focus();
            };
        }
 private void FocusSetup()
 {
     EmailEntryXaml.Completed += (s, e) => PasswordEntryXaml.Focus();
 }