Write SQL query to solve given problem: How many Credit Card complaints did Sharon handle?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(T1.`Complaint ID`) FROM callcenterlogs AS T1 INNER JOIN events AS T2 ON T1.`Complaint ID` = T2.`Complaint ID` WHERE T2.Product = 'Credit card' AND T1.server = 'SHARON'