Laravel 8 - How to redirect to Login page when not logged in

I'm using Laravel 8 and am having trouble with redirecting the user when they are not logged in. I have found several similar questions but they are all in older versions of laravel and none of their solutions work.

I believe I am supposed to use Route::group() to apply the redirect to all my routes. It currently looks like this:

// In web.php


Route::group(, function(){
    Route::get('/', [HomeController::class, 'home'])->name('home');
    Route::get('/account', [HomeController::class, 'account'])->name('account');
    Route::get('/feedback', [HomeController::class, 'feedback'])->name('feedback');
    Route::get('/help', [HomeController::class, 'help'])->name('help');
});

I'm not sure what I'm supposed to be using in my first parameter in the group function. I believe that I need it to look through either the session or a cookie to see if there is a logged user?

At the moment, a user is stopped from logging in if they are on the login page and type the wrong user/password so the authentication is working. However, if they manually type a url in, ex. ip:port/help, they will be allowed access.

I want to have all routes on the site redirect to the login page unless the user is authenticated.

My Authentication code looks like this in my LoginController.php:

public function doLogin(Request $request){
        DB::connection('mysql');
        $args = $request->except('_token');

        // attempt to do the login
        if (Auth::attempt($args)) {

            // validation successful!
            return redirect('home');

        } else {        

            // validation not successful, send back to form 
            return redirect('login');
        }

    }

My route to get to the doLogin function which is called from an html form action looks like:

Route::post('authenticate', [LoginController::class, 'doLogin'])->middleware('web');

If anyone could give any solutions or lead me on the right path, that'd be amazing. Thanks!

Edit: Solution!

Route::group(['middleware' => 'auth'], function(){
    Route::get('/', [HomeController::class, 'home'])->name('home');
    Route::get('/account', [HomeController::class, 'account'])->name('account');
    Route::get('/feedback', [HomeController::class, 'feedback'])->name('feedback');
    Route::get('/help', [HomeController::class, 'help'])->name('help');
});