@type t() :: %Inttegro.CreateCustomerRequest{
  billing_address: Inttegro.CustomerAddressInput.t() | nil,
  custom_data: %{optional(String.t()) => term()} | nil,
  email_address: String.t() | nil,
  name: String.t(),
  phone_number: String.t() | nil,
  reference: String.t() | nil,
  shipping_address: Inttegro.CustomerAddressInput.t() | nil,
  title: String.t() | nil
}