App\Http\Controllers\UserController::switchAccount PHP Method

    public function switchAccount($newUserId)
    {
        $oldUserId = Auth::user()->id;
        $referer = Request::header('referer');
        $account = $this->accountRepo->findUserAccounts($newUserId, $oldUserId);
        if ($account) {
            if ($account->hasUserId($newUserId) && $account->hasUserId($oldUserId)) {
                Auth::loginUsingId($newUserId);
                Auth::user()->account->loadLocalizationSettings();
                // regenerate token to prevent open pages
                // from saving under the wrong account
                Session::put('_token', str_random(40));
            }
        }
        // If the user is looking at an entity redirect to the dashboard
        preg_match('/\\/[0-9*][\\/edit]*$/', $referer, $matches);
        if (count($matches)) {
            return Redirect::to('/dashboard');
        } else {
            return Redirect::to($referer);
        }
    }