Answers for "class "app\http\controllers\owner" not found"

Class "App\Http\Controllers\Auth" not found

use Illuminate\Support\Facades\Auth;

Class 'App\Http\Controllers\Response' not found

use Illuminate\Support\Facades\Response;
Or
use Response;

Or use full namespace:
return \Response::json(...);

Or just use helper:
return response()->json(...);