public async Task DapperAsyncReturnManyItems()
 {
     var sqlHelper = new SqlServerHelper(ConnectionString);
     string storedName = "usp_Blog_GetActiveUsers";
     DateTime? onday = null;
     var query = await sqlHelper.GetManyItemsAsync<User>(storedName, new { OnDay = onday });
     List<User> users = query.ToList();
     Assert.IsTrue(users != null && users[0].UserName == "toan");
 }