@type t() :: %ExOanda.CreateTransaction{
  account_id: String.t() | nil,
  account_number: integer() | nil,
  account_user_id: integer() | nil,
  batch_id: String.t() | nil,
  division_id: integer() | nil,
  home_currency: String.t() | nil,
  id: String.t() | nil,
  request_id: String.t() | nil,
  site_id: integer() | nil,
  time: DateTime.t() | nil,
  type: ExOanda.Type.Atom.t() | nil,
  user_id: integer() | nil
}