(function($) {
$(document).on( 'click', 'a.mylink', function( event ) {
    $.ajax({
    url: testing.ajax_url,
        data : {
        action : 'diplay_user_table'
    },
    success : function( response ) {
        jQuery('#user_reponse').html( response );
    }


})
})
})(jQuery);

add_action( 'wp_enqueue_scripts', 'ajax_test_enqueue_scripts' );
            function ajax_test_enqueue_scripts() {
            wp_enqueue_script( 'test', plugins_url( '/test.js', __FILE__ ), array('jquery'), '1.0', true );


            wp_localize_script( 'test', 'testing', array(
                    'ajax_url' => admin_url( 'admin-ajax.php' )
            ));
            }


            add_action('wp_ajax_my_action', 'diplay_user_table');



            function diplay_user_table() {


            echo "function is loading in div";
     }