Updating email/password not working, undefined variable - laravel

Question

I am trying to use a code from https://www.youtube.com/watch v=EM0Wdcux6AE&t=13s&ab_channel=SevenStac , which is very helpful. Although I can't make the updating password/email part.
Error: it shows an error $user is an undefined variable.
I have searched already, tried these:
Undefined variable: users
Undefined variable: user
but they're not applicable in my case because I'm using Laravel 9 with Firebase, firestore database.
I also tried doing:
php artisan cache:clear
php artisan route:clear
Disclaimer, most of these codes are copied from the youtube video. The login credentials, reset password in email, and register worked but not the updating part.
web.php:
Route::resource('/home/profile', App\Http\Controllers\Auth\ProfileController::class)->middleware('user','fireauth');
Note: This is the only line that I included because it is the only relevant part. You can ask if you want more.
settings.blade.php:
{!! Form::model($user, ['method'=>'PATCH', 'action'=> ['App\Http\Controllers\Auth\ProfileController#update',$user->uid]]) !!}
{!! Form::open() !!}
<div class="form-group px-3">
{!! Form::label('email', 'Email ',['class'=>'pt-3 col-12 text-left pl-0']) !!}
{!! Form::email('email', null, ['class'=>'col-md-8 form-control'])!!}
</div>
<div class="form-group px-3">
{!! Form::label('new_password', 'New Password:',['class'=>'col-12 text-left pl-0']) !!}
{!! Form::password('new_password', ['class'=>'col-md-8 form-control'])!!}
</div>
<div class="form-group px-3">
{!! Form::label('new_confirm_password', 'Confirm Password:',['class'=>'col-12 text-left pl-0']) !!}
{!! Form::password('new_confirm_password', ['class'=>'col-md-8 form-control'])!!}
</div>
{!! Form::submit('Save', ['class'=>'btn btn-primary']) !!}
{!! Form::close() !!}
ProfileController.php:
public function index()
{
//
$uid = Session::get('uid');
$user = app('firebase.auth')->getUser($uid);
return view('admin.settings',compact('user'));
}
public function update(Request $request, $id)
{
//
$auth = app('firebase.auth');
$user = $auth->getUser($id);
try {
if ($request->new_password == '' && $request->new_confirm_password =='') {
$request->validate([
'displayName' => 'required|min:3|max:12',
'email' =>'required',
]);
$properties =[
'displayName' => $request->displayName,
'email' => $request->email,
];
$updatedUser = $auth->updateUser($id, $properties);
if ($user->email != $request->email) {
$auth->updateUser($id, ['emailVerified'=>false]);
}
Session::flash('message', 'Profile Updated');
return back()->withInput();
} else {
$request->validate([
'new_password' => 'required|max:18|min:8',
'new_confirm_password' => 'same:new_password',
]);
$updatedUser = $auth->changeUserPassword($id, $request->new_password);
Session::flash('message', 'Password Updated');
return back()->withInput();
}
return $input;
} catch (\Exception $e) {
Session::flash('error', $e->getMessage());
return back()->withInput();
}
Note: in "return $input" it shows an error also, that it is an undefined variable. However, it still worked before when I tried. But when I tried to incorporate my UI with these codes, it did not anymore.
General note: you may be confused that I am using ProfileController with my settings blade, it is because I don't want to move any codes first into my SettingsController, I'm still trying to make it work. Also, it worked before, now it did not.