Laravel 8 auth returns null - php

Question

Problem:
On my index page, authenticated users and guests should be able to view and use the page unless they want to save something. I tried to log in so that I could save the data and was redirected to an authenticated page which is a profile page. I tried dumping Auth::user() on the profile page, it returns the user logged in data, tried dumping it again on the index page then it returns null.
I'm using the latest version of Laravel.
I've googled some of the same problems I have and the closest one is this Auth::user() returns null. I tried following the answer provided but still, it returns null.
web.php
Route::group(['middleware' => 'web'], function () {
Route::get('/', [IndexController::class, 'index'])->name('index.page');
Auth::routes();
Route::group(['middleware' => ['auth:user']], function() {
Route::get('/user/profile', [UserController::class, 'profile'])->name('user.profile');
});
Route::group(['prefix' => 'admin', 'middleware' => ['auth:admin']], function() {
Route::get('dashboard',[DashboardController::class, 'index'])->name('admin.dashboard');
});
})
auth.php
'defaults' => [
'guard' => 'web',
'passwords' => 'users',
],
'guards' => [
'web' => [
'driver' => 'session',
'provider' => 'users',
],
'user' => [
'driver' => 'session',
'provider' => 'users',
],
'admin' => [
'driver' => 'session',
'provider' => 'admins',
],
],
'providers' => [
'users' => [
'driver' => 'eloquent',
'model' => App\Models\User::class,
],
'admins' => [
'driver' => 'eloquent',
'model' => App\Models\Admin::class,
],
],
'passwords' => [
'users' => [
'provider' => 'users',
'table' => 'password_resets',
'expire' => 60,
'throttle' => 60,
],
'admins' => [
'provider' => 'admins',
'table' => 'password_resets',
'expire' => 15,
],
],
This is the only modification I did from the middleware.
RedirectIfAuthenticated.php
foreach ($guards as $guard) {
if ($guard === "admin" && Auth::guard($guard)->check()) {
return redirect('/admin/dashboard');
}
if ($guard === "user" && Auth::guard($guard)->check()) {
return redirect('/user/profile');
}
if (Auth::guard($guard)->check()) {
return redirect('/');
}
}
I added $guard for the User and Admin model
User.php
protected $guard = 'user';
Admin.php
protected $guard = 'admin';
If you have any questions, feel free to ask and thanks for the help!

Answer 1

But i guess the customized Auth.php has a problem
foreach ($guards as $guard) {
if ($guard === "admin" && Auth::guard($guard)->check()) {
return redirect('/admin/dashboard');
}else{
if ($guard === "user" && Auth::guard($guard)->check()) {
return redirect('/user/profile');
}else{
return redirect('/');
}
}
}

Answer 2

I can share the solution that worked for me. I switched from Passport to Sanctum.