@type t() ::
  %Twilio.Schemas.SipDomainsAuthRegistrationsCredentialListMappingsListResponse{
    __extra__: %{optional(String.t()) => term()},
    __present__: [atom()],
    contents:
      [Twilio.Schemas.SipAuthRegistrationsCredentialListMapping.t()] | nil,
    end: integer() | nil,
    first_page_uri: String.t() | nil,
    next_page_uri: String.t() | nil,
    page: integer() | nil,
    page_size: integer() | nil,
    previous_page_uri: String.t() | nil,
    start: integer() | nil,
    uri: String.t() | nil
  }