private async Task GetUserNamesByAge()
{
var age = _uiHandler.GetAgeToQuery();
var names = await _userModel.GetUserNamesByAge(age);
if (names.Count == 0)
{
_uiHandler.DisplayOnUi($"No users found for given age: {age}");
}
else
{
_uiHandler.DisplayOnUi(string.Join(",", names));
}
}