GoogleTokenController.php

<?php

/**
 * @param Request $request
 * @return \Illuminate\Http\RedirectResponse
 */
public function update(Request $request)
{
    if (is_null($request->get('token'))) {
        return $this->disableToken();
    }

    $secretKey = $request->get('secret');
    $token = $request->get('token');
    if (Google2FA::verifyKey($secretKey, $token)) {
        auth()->user()->update(['google_token' => $secretKey]);

        return redirect('/profile/token')->with('success', 'Google Token successfully enabled!');
    }

    return redirect('/profile/token')->withErrors(['error' => 'The provided token does not match.']);
}

/**
 * @return \Illuminate\Http\RedirectResponse
 */
private function disableToken()
{
    auth()->user()->update(['google_token' => null]);

    return redirect('/profile/token')->with('success', 'Google Token successfully removed!');
}