V1
@Serializable
data class V1(val authData: RoomKeyBackupAuthData.RoomKeyBackupV1AuthData, val count: Long, val etag: String, val version: String, val algorithm: RoomKeyBackupAlgorithm.RoomKeyBackupV1 = RoomKeyBackupAlgorithm.RoomKeyBackupV1) : GetRoomKeysBackupVersionResponse