Too few arguments to function App\Http\Controllers\TimeUserController::save(), 1 passed in Controller - laravel-9

Question

I have an error:
Too few arguments to function App\Http\Controllers\TimeUserController::save(), 1 passed in C:\xampp\htdocs\lreport\vendor\laravel\framework\src\Illuminate\Routing\Controller.php on line 54 and exactly 3 expected
I want to insert data into the TimeUser table in the database. But before the data is stored in the table, I want to check first whether the id_user has been registered or not.
I'm trying to create a controller like this:
public function save($id_user, Request $request){
$id_user = TimeUser::findOrFail($id_user);
if ($id_user == null) {
$user = Auth::user();
$id = $request->id;
$id_user = $user['id'];
$time_start = date('Y-m-d H:i:s');
$time_user['id'] = $id;
$time_user['id_user'] = $id_user;
$time_user['time_start'] = $time_start;
TimeUser::create($time_user);
return redirect()->intended('home');
} else {
$time_start = date('Y-m-d H:i:s');
$time_user['time_start'] = $time_start;
TimeUser::create($time_user);
return redirect()->intended('home');
}
return redirect()->intended('/');
}
And route in web like this:
Route::controller(TimeUserController::class)->group(function () {
Route::post('/timeuser/save', 'save');
Route::get('/timeuser/save/{$id_user}', 'save');
});
in my blade.php
<form method="POST" action="{{ url('/timeuser/save')}}">
#csrf
<div class="btn-group me-2" role="group" aria-label="First group">
<button type="submit" class="btn btn-primary">START</button>
</div>
</form>
<br>
<div class="btn-group me-2" role="group" aria-label="First group">
<button type="button" class="btn btn-success">GO TO CLASSROOM</button>
</div>
<div class="btn-group me-2" role="group" aria-label="First group">
<button type="button" class="btn btn-danger">FINISH</button>
</div>
<br>
<table>
<tr>
<td>Duration</td>
<td>:</td>
<td></td>
</tr>
<tr>
<td>Last Logout </td>
<td> :</td>
<td></td>
</tr>
</table>
</div>
What and how should I fix my controller part?