Added sequence mapping for user_card table so that row creation works properly with PostgreSQL.

module/VuFind/config/module.config.php

@@ -234,6 +234,7 @@ $config = [
             'session'        => ['id', 'session_id_seq'],
             'tags'           => ['id', 'tags_id_seq'],
             'user'           => ['id', 'user_id_seq'],
+            'user_card'      => ['id', 'user_card_id_seq'],
             'user_list'      => ['id', 'user_list_id_seq'],
             'user_resource'  => ['id', 'user_resource_id_seq'],
         ],