worpress Like WP REST API

function.php

<?php
/*****************************************************************
 ** Like WP REST API -start   *******
 ******************************************************/

/**
 *
 * Registers REST API endpoints 
 *
 * @since 1.0.0
 */
add_action('rest_api_init', 'get_Liked_Post_Meta_Data_InfoRegister');

function get_Liked_Post_Meta_Data_InfoRegister()
{
    register_rest_route('wp/v2', '/stnc_like/id/(?P<id>[\d]+)',
        array(
            'methods' => 'GET',
            'callback' => 'get_Liked_Post_Meta_Data_Info',
            'permission_callback' => function ($request) {
                return is_user_logged_in();
            },
        )
    );

}
/**
 *  get post meta for _liked
 *
 * @since 1.2.0
 * @param WP_REST_Request $request The request sent from WP REST API.
 * @return array Gets quiz list
 */
function get_Liked_Post_Meta_Data_Info(WP_REST_Request $request)
{
    $postID = $request['id'];
    $result = (get_post_meta($postID, '_liked', true));

    if ($result == '' or $result == 'NaN') {
        return $result = 0;
    }

    return $result;
}