public Task UnFollowAsync(ITwitchViewer viewer)
 {
     this.viewers.Remove(viewer);
     return(Task.CompletedTask);
 }
 public Task UnSubscribeAsync(ITwitchViewer viewer)
 {
     this.viewers.Remove(viewer);
     return(Task.CompletedTask);
 }
 public Task FollowAsync(ITwitchViewer viewer)
 {
     this.viewers.Add(viewer);
     return(Task.CompletedTask);
 }
 public Task SubscribeAsync(ITwitchViewer viewer)
 {
     this.viewers.Add(viewer);
     return(Task.CompletedTask);
 }