curl --request GET \
  --url https://api.sprucecollective.co.uk/rewards/summary \
  --header 'Authorization: <api-key>'

{
  "current_points": 123,
  "current_streak_months": 123,
  "discount_claims_count": 123,
  "lifetime_months": 123,
  "milestones_awarded": {},
  "next_discount_bonus_at": 123,
  "next_loyalty_bonus_amount": 123,
  "next_milestone_at": 123,
  "next_referral_bonus_at": 123,
  "referral_points_awarded": 123,
  "referral_signup_points_awarded": 123,
  "referral_signups_count": 123,
  "site_id": "<string>",
  "successful_referrals_count": 123,
  "user_id": "<string>"
}