public async Task <List <Channel> > Channels(string teamId)
        {
            GraphServiceClient client = await graphTokenService.GetClientForUser(new[] { "profile" });

            ITeamChannelsCollectionPage page = await client
                                               .Teams[teamId]
                                               .Channels
                                               .Request()
                                               .GetAsync();
            var data = page.ToList();

            // AddToCache(data, ChannelKey);

            return(data);
        }