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Custom Post types not being displayed in Wordpress dashboard

Hi, i added a function for Custom Post Types but i dose not seam to appear in the Wordpress dashboard menu. I tried adding the function in setup.php as well as a mu-plugin. Also I checked the screen options to see if custom post types was checked as well as saved the permalinks to flush_rewrite_rules().

This is my code.
   function create_clients_post_type() {
   	$labels = array(
   		'name'               	=> 'Clients',
   		'singular_name'      	=> 'Client',
   		'menu_name'          	=> 'Clients',
   	);
   	$args = array(
     	'labels' => $labels,
   		'public' => true,
       'show_ui' => true,
       'menu_position' => 21,
       'show_in_menu'  => true,
       'menu_icon' => 'dashicons-welcome-learn-more',
       'capability_type' => 'post',
   	);
   	register_post_type( 'client', $args );
   }
   add_action( 'init', 'create_clients_post_type', 12 );

Thank you