Add user randomly

core/um-filters-members.php

@@ -235,6 +235,17 @@
 		return $query_args;
 	}
 
+	/***
+	***	@sorting random
+	***/
+	add_filter('pre_user_query', function($query) {
+	   if($query->query_vars["orderby"] == 'random') {
+	       $query->query_orderby = 'ORDER by RAND()';
+	   }
+
+	   return $query;
+	});
+
 	/***
 	***	@hook in the member results array
 	***/