public void ImportFromJson(String filePath)
{
Int32 deleted = repository.DeleteAllDeposits();
String json = System.IO.File.ReadAllText(filePath);
IEnumerable<Deposit> deposits = JsonConvert.DeserializeObject<IEnumerable<Deposit>>(json);
Int32 added = repository.AddDeposits(deposits);
TempData["message"] = $"{deleted.ToString()} deposits were deleted. {added.ToString()} deposits were added";
}