curl --request POST \
  --url https://app.sandbox.rio.trade/api/users/link \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "country": "US",
  "email": "john.doe@example.com",
  "userType": "individual",
  "businessName": "My Business Inc.",
  "firstName": "John",
  "middleName": "Michael",
  "lastName": "Doe",
  "secondLastName": "Smith",
  "brokerId": "655f4084b96e4fb76f5a0e6e"
}
'

import requests

url = "https://app.sandbox.rio.trade/api/users/link"

payload = {
    "country": "US",
    "email": "john.doe@example.com",
    "userType": "individual",
    "businessName": "My Business Inc.",
    "firstName": "John",
    "middleName": "Michael",
    "lastName": "Doe",
    "secondLastName": "Smith",
    "brokerId": "655f4084b96e4fb76f5a0e6e"
}
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    country: 'US',
    email: 'john.doe@example.com',
    userType: 'individual',
    businessName: 'My Business Inc.',
    firstName: 'John',
    middleName: 'Michael',
    lastName: 'Doe',
    secondLastName: 'Smith',
    brokerId: '655f4084b96e4fb76f5a0e6e'
  })
};

fetch('https://app.sandbox.rio.trade/api/users/link', 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 => "https://app.sandbox.rio.trade/api/users/link",
  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([
    'country' => 'US',
    'email' => 'john.doe@example.com',
    'userType' => 'individual',
    'businessName' => 'My Business Inc.',
    'firstName' => 'John',
    'middleName' => 'Michael',
    'lastName' => 'Doe',
    'secondLastName' => 'Smith',
    'brokerId' => '655f4084b96e4fb76f5a0e6e'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-key: <api-key>"
  ],
]);

$response = curl_exec($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 := "https://app.sandbox.rio.trade/api/users/link"

	payload := strings.NewReader("{\n  \"country\": \"US\",\n  \"email\": \"john.doe@example.com\",\n  \"userType\": \"individual\",\n  \"businessName\": \"My Business Inc.\",\n  \"firstName\": \"John\",\n  \"middleName\": \"Michael\",\n  \"lastName\": \"Doe\",\n  \"secondLastName\": \"Smith\",\n  \"brokerId\": \"655f4084b96e4fb76f5a0e6e\"\n}")

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

	req.Header.Add("x-api-key", "<api-key>")
	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("https://app.sandbox.rio.trade/api/users/link")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"country\": \"US\",\n  \"email\": \"john.doe@example.com\",\n  \"userType\": \"individual\",\n  \"businessName\": \"My Business Inc.\",\n  \"firstName\": \"John\",\n  \"middleName\": \"Michael\",\n  \"lastName\": \"Doe\",\n  \"secondLastName\": \"Smith\",\n  \"brokerId\": \"655f4084b96e4fb76f5a0e6e\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.sandbox.rio.trade/api/users/link")

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

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"country\": \"US\",\n  \"email\": \"john.doe@example.com\",\n  \"userType\": \"individual\",\n  \"businessName\": \"My Business Inc.\",\n  \"firstName\": \"John\",\n  \"middleName\": \"Michael\",\n  \"lastName\": \"Doe\",\n  \"secondLastName\": \"Smith\",\n  \"brokerId\": \"655f4084b96e4fb76f5a0e6e\"\n}"

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

{
  "userId": "66562bc04fe8bf83c577c178",
  "onboardingLink": "https://verification.example.com/session/123",
  "termsLink": "https://terms.example.com/123"
}

{
  "errors": [
    {
      "code": 19,
      "message": "Not authorized"
    }
  ]
}

{
  "errors": [
    {
      "code": 1,
      "message": "User not found"
    }
  ]
}