getUserChatBoosts(chatId, userId, form = {}) {
    form.chat_id = chatId;
    form.user_id = userId;
    return this._request('getUserChatBoosts', { form });
  }
Use this method to get the list of boosts added to a chat by a use.
Requires administrator rights in the chat

@param {Number|String} chatId  Unique identifier for the group/channel
@param {Number} userId Unique identifier of the target user
@param {Object} [options] Additional Telegram query options
@return {Promise} On success, returns a [UserChatBoosts](https://core.telegram.org/bots/api#userchatboosts) object
@see https://core.telegram.org/bots/api#getuserchatboosts