fix rowcount

web/db.py

@@ -694,7 +694,7 @@ def delete_user_by_id(user_id: int) -> bool:
         result = session.execute(
             text("DELETE FROM users WHERE user_id = :u"), {"u": user_id})
         session.commit()
-        return result.rowcount > 0
+        return result.cursor.rowcount > 0
 
 # ---------------- Regions/Keywords helpers ---------------------------------