curl --request POST \
  --url https://{workspace}.spreesuite.com/billspree/users/update-user \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "user": {
    "partyID": 789,
    "partyNumber": 789,
    "name": "Jane Doe",
    "email": "jane@example.com",
    "connectionGroups": [
      {
        "connectionGroupLabel": "BA-001"
      }
    ]
  },
  "method": "Update",
  "action": "Update Parties",
  "apiVersion": "v2"
}
'

import requests

url = "https://{workspace}.spreesuite.com/billspree/users/update-user"

payload = {
    "user": {
        "partyID": 789,
        "partyNumber": 789,
        "name": "Jane Doe",
        "email": "jane@example.com",
        "connectionGroups": [{ "connectionGroupLabel": "BA-001" }]
    },
    "method": "Update",
    "action": "Update Parties",
    "apiVersion": "v2"
}
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    user: {
      partyID: 789,
      partyNumber: 789,
      name: 'Jane Doe',
      email: 'jane@example.com',
      connectionGroups: [{connectionGroupLabel: 'BA-001'}]
    },
    method: 'Update',
    action: 'Update Parties',
    apiVersion: 'v2'
  })
};

fetch('https://{workspace}.spreesuite.com/billspree/users/update-user', 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://{workspace}.spreesuite.com/billspree/users/update-user",
  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([
    'user' => [
        'partyID' => 789,
        'partyNumber' => 789,
        'name' => 'Jane Doe',
        'email' => 'jane@example.com',
        'connectionGroups' => [
                [
                                'connectionGroupLabel' => 'BA-001'
                ]
        ]
    ],
    'method' => 'Update',
    'action' => 'Update Parties',
    'apiVersion' => 'v2'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "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 := "https://{workspace}.spreesuite.com/billspree/users/update-user"

	payload := strings.NewReader("{\n  \"user\": {\n    \"partyID\": 789,\n    \"partyNumber\": 789,\n    \"name\": \"Jane Doe\",\n    \"email\": \"jane@example.com\",\n    \"connectionGroups\": [\n      {\n        \"connectionGroupLabel\": \"BA-001\"\n      }\n    ]\n  },\n  \"method\": \"Update\",\n  \"action\": \"Update Parties\",\n  \"apiVersion\": \"v2\"\n}")

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

	req.Header.Add("Authorization", "<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://{workspace}.spreesuite.com/billspree/users/update-user")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"user\": {\n    \"partyID\": 789,\n    \"partyNumber\": 789,\n    \"name\": \"Jane Doe\",\n    \"email\": \"jane@example.com\",\n    \"connectionGroups\": [\n      {\n        \"connectionGroupLabel\": \"BA-001\"\n      }\n    ]\n  },\n  \"method\": \"Update\",\n  \"action\": \"Update Parties\",\n  \"apiVersion\": \"v2\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://{workspace}.spreesuite.com/billspree/users/update-user")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"user\": {\n    \"partyID\": 789,\n    \"partyNumber\": 789,\n    \"name\": \"Jane Doe\",\n    \"email\": \"jane@example.com\",\n    \"connectionGroups\": [\n      {\n        \"connectionGroupLabel\": \"BA-001\"\n      }\n    ]\n  },\n  \"method\": \"Update\",\n  \"action\": \"Update Parties\",\n  \"apiVersion\": \"v2\"\n}"

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

{
  "success": true,
  "statusCode": 200,
  "message": "Request Succeeded.",
  "error": null,
  "data": {}
}