@type t() :: %PolarExpress.Resources.Customers{
  avatar_url: String.t() | nil,
  billing_address: term() | nil,
  created_at: String.t() | nil,
  deleted_at: term() | nil,
  email: term() | nil,
  email_verified: boolean() | nil,
  external_id: term() | nil,
  id: String.t() | nil,
  locale: term() | nil,
  metadata: map() | nil,
  modified_at: term() | nil,
  name: term() | nil,
  organization_id: String.t() | nil,
  tax_id: term() | nil,
  type: String.t() | nil
}