laravel8 storing ids from controller

I want to extract id(as primary key) from following dd($cv)

and then make it equal to CV_id in order to stroe it in DB table :
This is storing method that I used in controller :

    public function appl(Request $request)
    { 
      
        $application = new JobApplication;
        $jobs = Job::find($request->job_id)->get();
        $application->job_id =$request->job_id;

    
          $user = User::find(auth()->user()->id);
         $application->user_id = auth()->user()->id;

 
 

         $cv = auth()->user()->cv->get('id');
         dd( $cv);

         $application->cv_id = auth()->user()->id;
        
        $application->save();
        
 





    
}

So the question is how to extract only id from that user_id

>Solution :

Just user like a normal model and get id from it.

     dd( $cv->id);
     dd( $cv->user_id);

etc..