@type t() :: %Inttegro.PageMessageTemplatesRequest{
  channel: Inttegro.MessageTemplateChannel.t() | nil,
  locale: String.t() | nil,
  page: integer() | nil,
  purpose: String.t() | nil,
  size: integer() | nil,
  status: Inttegro.MessageTemplateStatus.t() | nil
}