public function postTambahPersonil(Request $request)
 {
     $validator = Validator::make($request->all(), ['nama_personil' => 'required', 'unit_id' => 'required', 'jabatan_id' => 'required']);
     $request['created_by'] = Auth::user()->id;
     if ($validator->fails()) {
         return redirect()->back()->withErrors($validator)->withInput();
     }
     $input = $request->only(['nik', 'nama_personil', 'email', 'singkatan', 'unit_id', 'jabatan_id', 'atasan_id', 'created_by']);
     $input['atasan_id'] = $input['atasan_id'] != '' ? $input['atasan_id'] : null;
     Personil::create($input);
     return redirect('personil/list-personil');
 }