How to add admin panel Menu in wordpress

My plugin is successfully activated but I am not able to add the admin panel menu in WordPress. Please check the below code.

<?php 

add_action('admin_menu','hybreeder_admin_menu');

function hybreeder_admin_menu()

{

add_menu_page( 'hybreeder_service',
                'services', 
                'administration',
                 'hybreeder_slug', 
                 'hybreeder_admin_menu_setup',
                  'dashicons-admin-generic', 
                  '90' 
      );

}




function hybreeder_admin_menu_setup()

{

echo "<h1>hybreeder services</h1>";

}

via Chebli Mohamed