curl --request GET \
  --url https://api.example.com/api/v1/referral/stats \
  --header 'Authorization: Bearer <token>'

{
  "total_earned": 123,
  "active_referrals": 123,
  "referral_uses": [
    {
      "status": "<string>",
      "created_at": "<string>",
      "converted_at": "<string>"
    }
  ]
}