/// <summary>
/// Save options and close form
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnOk_Click(object sender, EventArgs e)
{
//Update credentials with form control values and save to file
_apiCredentials.Username = txtSparkUsername.Text.Trim();
_apiCredentials.Password = txtSparkPassword.Text.Trim();
_apiCredentials.SaveToFile();
//Close form
Close();
}
