Giveaway
constructor(chat: Chat, giveawayMessageId: Long, winnersSelectionDate: Instant, winnerCount: Int, winners: List<User>, additionalChatCount: Int? = null, prizeStarCount: Int? = null, premiumSubscriptionMonthCount: Int? = null, unclaimedPrizeCount: Int? = null, onlyNewMembers: Boolean? = null, wasRefunded: Boolean? = null, prizeDescription: String? = null)