$q = $request->input('q');
  $response = $client->search([
        'index' => 'users',
        'type' => 'user',
        'body' => [
            'query' => [
                'bool' => [
                    'should' => [
                        ['match' => [ 'text' => $q ] ],
                    ],
                ],
            ],
        ],
    ]);