public async Task ListTransactions([CanBeNull, Summary("Filter only to transactions with this user")] IUser other = null)
{
//Get all transactions in both directions
var all = (await _transactions.GetAllTransactions(Context.User.Id, other?.Id)).ToArray();
if (all.Length == 0)
{
await ReplyAsync("No transactions");
}
else
{
await DisplayTransactions(all);
}
}