@type t() :: %Merchant.Event{
  category: (String.t() | nil) | nil,
  end_date: (DateTime.t() | nil) | nil,
  location: (Merchant.EventLocation.t() | nil) | nil,
  market: (String.t() | nil) | nil,
  name: (String.t() | nil) | nil,
  start_date: (DateTime.t() | nil) | nil,
  supplier: (String.t() | nil) | nil,
  supplier_payment_date: (DateTime.t() | nil) | nil,
  tickets: ([Merchant.Ticket.t()] | nil) | nil
}