@type t() :: %Spatio.Model.DmAttachRequest{
  accountId: String.t() | nil,
  filename: String.t() | nil,
  height: integer() | nil,
  kind: String.t(),
  mimeType: String.t() | nil,
  sizeBytes: integer() | nil,
  thumbnailUrl: Uri | nil,
  url: Uri,
  width: integer() | nil
}