public List <BlockDto> GetBlockedList(int userID)
        {
            var user = userMockRepository1.GetUserById(userID);

            if (user == null)
            {
                throw new UserException("There is no user with that ID, try with anotherone!");
            }

            var blockList = blockingRepository1.GetBlockedList(userID);

            if (blockList == null || blockList.Count == 0)
            {
                throw new UserException("User with that ID is not yet blocked by any other user, try with another user!");
            }

            return(mapper1.Map <List <BlockDto> >(blockList));
        }