* @param int|string $seen
* If 0 only include notifications into the query
* which aren't marked as "seen"
* @param int $start Start the query at this point
* @param int $limit Maximum number of query results
* @param int|string $seen
* If 0 only include notifications into the query
* which aren't marked as "seen"
* @param int $start Start the query at this point
* @param int $limit Maximum number of query results