@type t() :: %Polarex.CustomerBenefitGrantCustom{
  benefit: Polarex.BenefitCustomSubscriber.t(),
  benefit_id: String.t(),
  created_at: DateTime.t(),
  customer: Polarex.CustomerPortalCustomer.t(),
  customer_id: String.t(),
  error: Polarex.BenefitGrantError.t() | nil,
  granted_at: DateTime.t() | nil,
  id: String.t(),
  is_granted: boolean(),
  is_revoked: boolean(),
  member_id: String.t() | nil,
  modified_at: DateTime.t() | nil,
  order_id: String.t() | nil,
  properties: map(),
  revoked_at: DateTime.t() | nil,
  subscription_id: String.t() | nil
}