curl --request GET \
  --url https://api.topsort.com/public/v1/billing-service/vendors/{external-vendor-id}/wallets \
  --header 'Authorization: Bearer <token>'

{
  "wallets": [
    {
      "walletId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "balance": 123
    }
  ]
}