using RestSharp;


var options = new RestClientOptions("https://api.sandbox.{id}.gr4vy.app/gift-cards/{gift_card_id}");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("Authorization", "Bearer <token>");
var response = await client.GetAsync(request);

Console.WriteLine("{0}", response.Content);

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api.sandbox.{id}.gr4vy.app/gift-cards/{gift_card_id}"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://api.sandbox.{id}.gr4vy.app/gift-cards/{gift_card_id}")
  .header("Authorization", "Bearer <token>")
  .asString();

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.sandbox.{id}.gr4vy.app/gift-cards/{gift_card_id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

import requests

url = "https://api.sandbox.{id}.gr4vy.app/gift-cards/{gift_card_id}"

headers = {"Authorization": "Bearer <token>"}

response = requests.get(url, headers=headers)

print(response.text)

const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.sandbox.{id}.gr4vy.app/gift-cards/{gift_card_id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

curl --request GET \
  --url https://api.sandbox.{id}.gr4vy.app/gift-cards/{gift_card_id} \
  --header 'Authorization: Bearer <token>'

{
  "type": "gift-card",
  "id": "e6cdf979-87e2-4796-8ff6-9784d5aed893",
  "merchant_account_id": "default",
  "service": {
    "type": "gift-card-service",
    "id": "6c020bf3-179b-4f4f-858d-84e39e196e0f",
    "merchant_account_id": "default",
    "gift_card_service_definition_id": "qwikcilver-gift-card",
    "display_name": "Qwikcilver UK",
    "active": true,
    "fields": [
      {
        "key": "secret_key",
        "value": "sk_test_26PHem9AhJZvU623DfE1x4sd"
      }
    ],
    "created_at": "2012-12-12T10:53:43+00:00",
    "updated_at": "2012-12-12T10:53:43+00:00"
  },
  "bin": "412345",
  "sub_bin": "554",
  "last4": "1234",
  "expiration_date": "2013-07-16T19:23:00.000+00:00",
  "buyer": {
    "type": "buyer",
    "id": "fe26475d-ec3e-4884-9553-f7356683f7f9",
    "billing_details": {
      "type": "billing-details",
      "first_name": "John",
      "last_name": "Lunn",
      "email_address": "john@example.com",
      "phone_number": "+1234567890",
      "address": {
        "city": "London",
        "country": "GB",
        "postal_code": "789123",
        "state": "Greater London",
        "state_code": "GB-LND",
        "house_number_or_name": "10",
        "line1": "10 Oxford Street",
        "line2": "New Oxford Court",
        "organization": "Gr4vy"
      },
      "tax_id": {
        "value": "12345678931",
        "kind": "gb.vat"
      }
    },
    "created_at": "2013-07-16T19:23:00.000+00:00",
    "display_name": "John L.",
    "external_identifier": "user-789123",
    "merchant_account_id": "default",
    "updated_at": "2013-07-16T19:23:00.000+00:00",
    "account_number": "1234567"
  },
  "created_at": "2013-07-16T19:23:00.000+00:00",
  "updated_at": "2013-07-16T19:23:00.000+00:00"
}

{
  "type": "error",
  "code": "unauthorized",
  "status": 401,
  "message": "No valid API authentication found",
  "details": []
}

{
  "type": "error",
  "code": "not_found",
  "status": 404,
  "message": "The resource could not be found",
  "details": []
}