/// <summary>
/// Unsubscribe a user from marketing emails using an unsubscribe link.
/// </summary>
/// <param name="unsubscribeId">Unsubscribe link ID</param>
/// <returns></returns>
public async Task UnsubscribeFromMarketing(string unsubscribeId)
{
// Unsubscribe the user.
await _database.UnsubscribeFromMarketing(unsubscribeId);
}
