@type t() :: %PolarExpress.Schemas.OrderCustomer{
  avatar_url: String.t() | nil,
  billing_address: PolarExpress.Schemas.Address.t() | nil,
  created_at: DateTime.t() | nil,
  deleted_at: DateTime.t() | nil,
  email: String.t() | nil,
  email_verified: boolean() | nil,
  external_id: String.t() | nil,
  id: String.t() | nil,
  locale: String.t() | nil,
  metadata: PolarExpress.Schemas.MetadataOutputType.t() | nil,
  modified_at: DateTime.t() | nil,
  name: String.t() | nil,
  organization_id: String.t() | nil,
  tax_id: [String.t() | PolarExpress.Schemas.TaxIDFormat.t()] | nil,
  type: PolarExpress.Schemas.CustomerType.t() | nil
}