curl --request GET \
  --url https://api.unibee.dev/merchant/overview_statistics \
  --header 'Authorization: Bearer <token>'

{
  "code": 123,
  "data": {
    "activePlansCount": 123,
    "paymentSuccessRate": 123,
    "successfulPaymentsCount": 123,
    "totalCustomersCount": 123
  },
  "merchantId": 123,
  "message": "<string>",
  "redirect": "<string>",
  "requestId": "<string>"
}