function wp_maintenance_idc(){
	if(!is_user_logged_in()) :
		echo "<h1>Briefly unavailable for scheduled maintenance. Keep it locked!</h1>";
	die();	
endif;
}

add_action('get_header', 'wp_maintenance_idc');{"id":1,"count":1,"description":"","link":"https:\/\/bmgoffices.com\/index.php\/category\/uncategorized\/","name":"Uncategorized","slug":"uncategorized","taxonomy":"category","parent":0,"meta":[],"_links":{"self":[{"href":"https:\/\/bmgoffices.com\/index.php\/wp-json\/wp\/v2\/categories\/1"}],"collection":[{"href":"https:\/\/bmgoffices.com\/index.php\/wp-json\/wp\/v2\/categories"}],"about":[{"href":"https:\/\/bmgoffices.com\/index.php\/wp-json\/wp\/v2\/taxonomies\/category"}],"wp:post_type":[{"href":"https:\/\/bmgoffices.com\/index.php\/wp-json\/wp\/v2\/posts?categories=1"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}