private async void _addCategoryBtn_Click(Object sender, EventArgs e)
        {
            InputNameDialog inputNameDialog = new InputNameDialog();

            if (inputNameDialog.ShowDialog() == DialogResult.OK)
            {
                await _storage.AddCategory(currentCategoryId, inputNameDialog.InputName);


                var categories = await _storage.GetCategories(currentCategoryId);

                currentCategoryId = 0;

                _categoriesList.DataSource = categories;
            }
        }