public static string IgnoreTweetsBy(string screenName)
        {
            var friendIds = _user.GetFriendIds();

            foreach (var id in friendIds)
            {
                if (User.GetUserFromId(id).ScreenName.Equals(screenName))
                {
                    _ignoreTweetsBy.AddOrUpdateKey(screenName, screenName, UpdateIgnoreTweetsFile);
                    return($"{screenName} will now be ignored when they post");
                }
            }
            return($"{screenName} was not found or not being followed");
        }