private async Task FillFieldDdls()
        {
            ActivityUI.AvailablePriorities.ListItems = _atlassianService
                                                       .GetPriorities(AuthorizationToken)
                                                       .ToListItems()
                                                       .ToList();

            ActivityUI.Sprint.ListItems = await _atlassianService.GetSprints(AuthorizationToken, ActivityUI.AvailableProjects.Value);

            var customFields = _atlassianService.GetCustomFields(AuthorizationToken);

            ActivityUI.AppendCustomFields(customFields);
        }