/* send data to Parse.com for verification */
    ParseUser.logInInBackground(usernametxt, passwordtxt,
        new LogInCallback() {
            public void done(ParseUser user, ParseException e) {
                            if (user != null) {
                                    if(user.emailVerified == true) {
                                    /* if user exists and is authenticated, notify user */
                                        Toast toast = Toast.makeText(getApplicationContext(),
                                                "Successfully Logged In", Toast.LENGTH_SHORT);
                                        toast.setGravity(Gravity.CENTER, 0, 0);
                                        toast.show();

                                        finish();
                                    }
                                }