discourse/app/serializers/email_log_serializer.rb

class EmailLogSerializer < ApplicationSerializer

  attributes :id,
             :reply_key,
             :to_address,
             :email_type,
             :user_id,
             :created_at,
             :skipped,
             :skipped_reason

  has_one :user, serializer: BasicUserSerializer, embed: :objects

  def include_skipped_reason?
    object.skipped
  end
end