checking liked user in wordpress rest api

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i want check liked user in wordpress rest api.

liked user store in custom meta field “cd_liked_disliked_users” and when return it :

i use below code for checking liked user but its not work , whats wrong ?

add_action( 'rest_api_init', function () {
  register_rest_route( 'base', '/like/(?P<id>d+)', array(
    'methods' => 'GET',
    'callback' => 'my_test',
  ));
});
function my_test (WP_REST_Request $request){
        $user_ip    = $_SERVER['REMOTE_ADDR'];
        $id         = $request['id'];
        $all_users = (array)get_post_meta( $id, 'cd_liked_disliked_users');
        if ( isset( $all_users[ $user_ip ] ) ) {
            return $all_users[ $user_ip ];
        } else {
            return 'New User';
        }
}

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