Usage:
1. Type a string in the search bar
2. Add in:users filter to avoid unnecessary searches in other apps
namespace OCA\Settings\Search;
use OCP\Accounts\IAccountManager;
-use OCP\AppFramework\Http\DataResponse;
-use OCP\AppFramework\OCS\OCSNotFoundException;
use OCP\IGroupManager;
use OCP\IL10N;
use OCP\IURLGenerator;
use OCP\Search\IProvider;
use OCP\Search\ISearchQuery;
use OCP\Search\SearchResult;
-use OCP\Search\SearchResultEntry;
-use OCP\Settings\IIconSection;
use OCP\Settings\IManager;
class UserSearch implements IProvider {