private async Task<long> GetRTOfMe_Failover(long sinceid)
{
var largestseenid = sinceid;
var rtofme = await UserSession.GetRetweetsOfMe(count: _pagingSize, sinceId: sinceid);
if (!rtofme.OK) return largestseenid;
foreach (var tweet in rtofme.Where(tweet => tweet.Id > sinceid))
{
largestseenid = tweet.Id;
_mentions.OnNext(tweet);
}
return largestseenid;
}