query Referees($code: ID!, $aggregationDays: Int) {
  referralSetReferees(id: $code, aggregationDays: $aggregationDays) {
    edges {
      node {
        referralSetId
        refereeId
        joinedAt
        atEpoch
        totalRefereeNotionalTakerVolume
        totalRefereeGeneratedRewards
      }
    }
  }
}