curl --request POST \
  --url http://staging.qshop.ng/apiv2/{shopId}/cart \
  --header 'Content-Type: application/json' \
  --data '
{
  "items": [
    {
      "_id": "6426e90031af623fe56938c8",
      "name": "New Samsung s16",
      "qty": 1,
      "variant": {
        "_id": "6426e90031af623fe56938c6"
      }
    }
  ],
  "user": "61a956551a113f7e13c45c10"
}
'

import requests

url = "http://staging.qshop.ng/apiv2/{shopId}/cart"

payload = {
    "items": [
        {
            "_id": "6426e90031af623fe56938c8",
            "name": "New Samsung s16",
            "qty": 1,
            "variant": { "_id": "6426e90031af623fe56938c6" }
        }
    ],
    "user": "61a956551a113f7e13c45c10"
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    items: [
      {
        _id: '6426e90031af623fe56938c8',
        name: 'New Samsung s16',
        qty: 1,
        variant: {_id: '6426e90031af623fe56938c6'}
      }
    ],
    user: '61a956551a113f7e13c45c10'
  })
};

fetch('http://staging.qshop.ng/apiv2/{shopId}/cart', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "http://staging.qshop.ng/apiv2/{shopId}/cart",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'items' => [
        [
                '_id' => '6426e90031af623fe56938c8',
                'name' => 'New Samsung s16',
                'qty' => 1,
                'variant' => [
                                '_id' => '6426e90031af623fe56938c6'
                ]
        ]
    ],
    'user' => '61a956551a113f7e13c45c10'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "http://staging.qshop.ng/apiv2/{shopId}/cart"

	payload := strings.NewReader("{\n  \"items\": [\n    {\n      \"_id\": \"6426e90031af623fe56938c8\",\n      \"name\": \"New Samsung s16\",\n      \"qty\": 1,\n      \"variant\": {\n        \"_id\": \"6426e90031af623fe56938c6\"\n      }\n    }\n  ],\n  \"user\": \"61a956551a113f7e13c45c10\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("http://staging.qshop.ng/apiv2/{shopId}/cart")
  .header("Content-Type", "application/json")
  .body("{\n  \"items\": [\n    {\n      \"_id\": \"6426e90031af623fe56938c8\",\n      \"name\": \"New Samsung s16\",\n      \"qty\": 1,\n      \"variant\": {\n        \"_id\": \"6426e90031af623fe56938c6\"\n      }\n    }\n  ],\n  \"user\": \"61a956551a113f7e13c45c10\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("http://staging.qshop.ng/apiv2/{shopId}/cart")

http = Net::HTTP.new(url.host, url.port)

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"items\": [\n    {\n      \"_id\": \"6426e90031af623fe56938c8\",\n      \"name\": \"New Samsung s16\",\n      \"qty\": 1,\n      \"variant\": {\n        \"_id\": \"6426e90031af623fe56938c6\"\n      }\n    }\n  ],\n  \"user\": \"61a956551a113f7e13c45c10\"\n}"

response = http.request(request)
puts response.read_body