def unsubscribe_to_email(options = {})
      unsubscribed_to_email_at = options[:unsubscribed_to_email_at] || Time.current
      update(subscribing_to_email: false, unsubscribed_to_email_at: unsubscribed_to_email_at)
    end
def unsubscribe_to_email(options = {})
      unsubscribed_to_email_at = options[:unsubscribed_to_email_at] || Time.current
      update(subscribing_to_email: false, unsubscribed_to_email_at: unsubscribed_to_email_at)
    end
Unsubscribes to the notification email.

 @param [Hash] options Options for unsubscribing the notification email
 @option options [DateTime] :subscribed_to_email_at (Time.current) Time to set to subscribed_to_email_at of the subscription record
 @return [Boolean] If successfully updated subscription instance