private async Task UpdateIsSignedIn()
{
_presenceViewModel.IsSignedIn = await _microsoftAuthentication.IsSignedInAsync();
if (_presenceViewModel.IsSignedIn)
{
_timer.Start();
_presenceViewModel.UserName = await _microsoftAuthentication.GetUserNameAsync();
_presenceViewModel.ProfileImage = await _presenceService.GetPhotoAsync();
}
else
{
_timer.Stop();
_presenceViewModel.ProfileImage = _presenceService.GetDefaultPhoto();
}
}