private void button1_Click(object sender, EventArgs e)
        {
            WebForm form = new WebForm();

            form.Authenticated += (o, auth) =>
            {
                Authentication.Add(auth);
                var g = Authentication.GetLogins();
                comboBox1.Items.Clear();
                foreach (string item in g)
                {
                    comboBox1.Items.Add(item);
                }
                comboBox1.SelectedIndex = 0;
                form.Dispose();
            };
            form.Show();
        }