/**
  * Store a newly created resource in storage.
  *
  * @param  \Illuminate\Http\Request $request
  *
  * @return \Illuminate\Http\Response
  */
 public function store(Request $request)
 {
     $this->validate($request, ['city' => 'required|unique', 'country' => 'required|exists:cities,country_id']);
     $city = new City();
     $city->city = $request->city;
     $city->country_id = $request->country;
     $city->save();
     foreach ($request->language as $language_id) {
         $city->language()->attach($language_id);
     }
     $statusCode = 200;
     $response = ["success" => "City successfully created"];
     return response($response, $statusCode);
 }