public static string GetParameter(this FriendsSearchResultsSortOrder provider)
        {
            switch (provider)
            {
            case FriendsSearchResultsSortOrder.Asc: return("asc");

            case FriendsSearchResultsSortOrder.Desc: return("desc");

            default: return(string.Empty);
            }
        }
        /// <summary>
        /// Gets friends of authenticated user.
        /// </summary>
        /// <remarks> Swagger method name:<c>Get Friends</c>.</remarks>
        /// <see cref="https://developers.xsolla.com/user-account-api/user-friends/get-friends"/>.
        /// <param name="token">JWT from Xsolla Login.</param>
        /// <param name="type">Friends type.</param>
        /// <param name="sortType">Condition for sorting users.</param>
        /// <param name="order">Condition for sorting users.</param>
        /// <param name="count">Maximum friends.</param>
        /// <param name="onSuccess">Successful operation callback.</param>
        /// <param name="onError">Failed operation callback.</param>
        public void GetUserFriends(
            string token,
            FriendsSearchType type,
            FriendsSearchResultsSort sortType   = FriendsSearchResultsSort.ByNickname,
            FriendsSearchResultsSortOrder order = FriendsSearchResultsSortOrder.Asc,
            int count = 100,
            Action <List <UserFriendEntity> > onSuccess = null, Action <Error> onError = null)
        {
            if (count <= 0)
            {
                Debug.LogError($"Can not requests friends with count {count}");
                return;
            }
            var url = string.Format(URL_USER_GET_FRIENDS, type.GetParameter(), sortType.GetParameter(), order.GetParameter(), USER_FRIENDS_DEFAULT_PAGINATION_LIMIT);

            StartCoroutine(GetUserFriendsCoroutine(token, url, count, onSuccess, onError));
        }