Laravel session for Custom Authentication

I am using one laravel 5.7 authentication with custom check and session. I have 5 type of user types

Session::put('user_type', $user_type); Session::put('user_id', $user_id);

When I tried to check session data in constructor I am facing one issue,Please hele me to solve this,

ErrorException (E_NOTICE) Trying to get property 'headers' of non-object

 public function __construct()
    {              
        $this->middleware(function ($request, $next) {
        $utype=Session::get('user_type');
        if($utype != 'ProjectAdmin'){
            return redirect()->route('login');
        }else{
            $this->objShareContract = shareContract::getShareContract(TRUE);
        }
    });
    }

via Chebli Mohamed