@type t() :: %PolarExpress.Schemas.CustomerPortalCustomer{
  billing_address: PolarExpress.Schemas.Address.t() | nil,
  billing_name: String.t() | nil,
  created_at: DateTime.t() | nil,
  default_payment_method_id: String.t() | nil,
  email: String.t() | nil,
  email_verified: boolean() | nil,
  id: String.t() | nil,
  modified_at: DateTime.t() | nil,
  name: String.t() | nil,
  oauth_accounts:
    %{
      required(String.t()) =>
        PolarExpress.Schemas.CustomerPortalOAuthAccount.t()
    }
    | nil,
  tax_id: [String.t() | PolarExpress.Schemas.TaxIDFormat.t()] | nil,
  type: PolarExpress.Schemas.CustomerType.t() | nil
}