public static ExpenseEntity ToTableEntity(this Expense model)
        {
            var expense = new ExpenseEntity
            {
                PartitionKey        = model.UserName.EncodePartitionAndRowKey(),
                RowKey              = model.Id == null ? null : KeyGenerator.ExpenseEntityRowKey(model.Id),
                Approved            = model.Approved,
                CostCenter          = model.CostCenter,
                Date                = model.Date,
                ReimbursementMethod = Enum.GetName(typeof(ReimbursementMethod), model.ReimbursementMethod),
                Title               = model.Title,
                ApproverName        = model.ApproverName
            };

            return(expense);
        }