private async Task FetchInstances()
{
IsLoading.Value = true;
Instances.Clear();
var res = await Http.GetAsync("https://join.misskey.page/instances.json");
var json = JsonConvert.DeserializeObject <JoinMisskeyInstances>(await res.Content.ReadAsStringAsync());
Instances.AddRangeOnScheduler(
json.Instances
.Where(i => i.Meta != null)
.Where(i => !i.Meta.DisableRegistration)
.OrderByDescending(i => i.Value)
.OrderByDescending(i => i.Meta.IsGroundpolis ? 1 : 0)
.Select(i => new JoinMisskeyInstanceViewModel(i))
);
IsLoading.Value = false;
}