public function edit($id)
 {
     if (Auth::user()->can('update-agreements')) {
         $agreement = Agreement::findOrFail($id);
         $clients = Client::orderBy('lastname', 'asc')->lists('lastname', 'id');
         $cars = Car::orderBy('sheet_number', 'asc')->lists('sheet_number', 'id');
         $status = AgreementStatus::orderBy('name', 'asc')->lists('name', 'id');
         return view('agreement::edit', compact('agreement', 'clients', 'cars', 'status'));
     }
     return redirect('auth/logout');
 }