@type t() :: %PolarExpress.Schemas.GenericPayment{
  amount: integer() | nil,
  checkout_id: String.t() | nil,
  created_at: DateTime.t() | nil,
  currency: String.t() | nil,
  decline_message: String.t() | nil,
  decline_reason: String.t() | nil,
  id: String.t() | nil,
  method: String.t() | nil,
  modified_at: DateTime.t() | nil,
  order_id: String.t() | nil,
  organization_id: String.t() | nil,
  processor: PolarExpress.Schemas.PaymentProcessor.t() | nil,
  processor_metadata: map() | nil,
  status: PolarExpress.Schemas.PaymentStatus.t() | nil
}