Custom multi-auth guard logging & routing

I'm developing a Laravel 6 app with 4 different users(with a different table for each). For this, I am using multi auth guard and created my first guard following this tutorial online (https://pusher.com/tutorials/multiple-authentication-guards-laravel).

Here is my custom guard "student"

    'guards' => [
    'web' => [
        'driver' => 'session',
        'provider' => 'users',
    ],
    'api' => [
        'driver' => 'token',
        'provider' => 'users',
        'hash' => false,
    ],
    'student' => [
        'driver' => 'session',
        'provider' => 'students',
    ],
],

And Providers

    'providers' => [
    'users' => [
        'driver' => 'eloquent',
        'model' => App\User::class,
    ],
    'students' => [
        'driver' => 'eloquent',
        'model' => App\Models\Student::class,
    ],
],

I have a custom login controller using a custom auth guard named 'student'

namespace App\Http\Controllers;

use App\Http\Controllers\Controller;
use Illuminate\Foundation\Auth\AuthenticatesUsers;
use Illuminate\Http\Request;
use Auth;
use Student;

class LoginController extends Controller
{
    public function __construct()
    {
        $this->middleware('guest')->except('logout');
        $this->middleware('guest:student')->except('logout');
    }
    public function studentLogin(Request $request)
    {
        $this->validate($request, [
            'email'   => 'required|email',
            'password' => 'required|min:5'
        ]);

        if (Auth::guard('student')->attempt(['email' => $request->email, 'password' => $request->password], $request->get('remember'))) {

            return redirect()->intended('admin/home')->with('smessage', 'Logged in successfully...!');
        }
        return back()->withInput($request->only('email', 'remember'));
    }...
    }

Now, Whenever I try to log in, It seems like I am logged in and redirected to the URL defined in the middleware/RedirectIfAuthenticated.php but this error pops up "Trying to get property of non-object" which is from the header where no data are on auth()->user() hence no view.blade.php is loaded.

Here are my routes:

Route::get('/', function () {
    return view('welcome');
});
Route::get('/login', 'LoginController@create')->name('login');
Route::post('login', 'LoginController@store');
Route::get('/login/student', 'LoginController@create')->name('studentlogin');
Route::post('/login/student', 'LoginController@studentLogin');

Route::get('/logout', 'LoginController@destroy')->name('logout'); 

Route::group(['prefix'=>'admin', 'namespace' => 'Dashboard', 'middleware'=> 'auth' ], function () {

    Route::get('home', 'DashboardController@display')->name('admin.home');

    Route::get('users', 'UserlistController@display')->name('admin.userlist');
    Route::post('users', 'UserlistController@store')->name('admin.create');
    Route::delete('users/{id}', 'UserlistController@destroy')->name('admin.deleteuser');

});

Route::group(['prefix'=>'student', 'namespace' => 'Students' ], function () {
    Route::get('all', 'StudentsController@display')->name('student.all');
    Route::delete('all/{id}', 'StudentsController@destroy')->name('student.delete');
    Route::post('all', 'StudentsController@store')->name('student.store');
});

Couldn't find any solutions from other related topics on StackOverflow. Please do correct me if I have any mistakes somewhere or let me know if you want to inspect any other files for the code.

Thanks in advance.

via Chebli Mohamed