def deliver_welcome_mail
      if has_role?('author') || has_role?('editor') || has_role?('admin')
        Notifications.alchemy_user_created(self).deliver_later
      else
        Notifications.member_created(self).deliver_later
      end
    end
def deliver_welcome_mail
      if has_role?('author') || has_role?('editor') || has_role?('admin')
        Notifications.alchemy_user_created(self).deliver_later
      else
        Notifications.member_created(self).deliver_later
      end
    end
Delivers a welcome mail depending from user's role.