curl --request POST \
  --url https://api.eflow.team/v1/networks/advertiser/signup \
  --header 'Content-Type: application/json' \
  --header 'X-Eflow-Api-Key: <api-key>' \
  --data '
{
  "firstname": "John",
  "lastname": "Smith",
  "company": "Brand Corp",
  "email": "john@brand.com",
  "website": "https://brand.com",
  "offer_landing_page": "https://brand.com/offer",
  "contact_address": {
    "address_1": "456 Market St",
    "city": "San Francisco",
    "zip_postal_code": "94105",
    "country_id": 232,
    "region_code": "CA"
  }
}
'

import requests

url = "https://api.eflow.team/v1/networks/advertiser/signup"

payload = {
    "firstname": "John",
    "lastname": "Smith",
    "company": "Brand Corp",
    "email": "john@brand.com",
    "website": "https://brand.com",
    "offer_landing_page": "https://brand.com/offer",
    "contact_address": {
        "address_1": "456 Market St",
        "city": "San Francisco",
        "zip_postal_code": "94105",
        "country_id": 232,
        "region_code": "CA"
    }
}
headers = {
    "X-Eflow-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-Eflow-Api-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    firstname: 'John',
    lastname: 'Smith',
    company: 'Brand Corp',
    email: 'john@brand.com',
    website: 'https://brand.com',
    offer_landing_page: 'https://brand.com/offer',
    contact_address: {
      address_1: '456 Market St',
      city: 'San Francisco',
      zip_postal_code: '94105',
      country_id: 232,
      region_code: 'CA'
    }
  })
};

fetch('https://api.eflow.team/v1/networks/advertiser/signup', 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://api.eflow.team/v1/networks/advertiser/signup",
  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([
    'firstname' => 'John',
    'lastname' => 'Smith',
    'company' => 'Brand Corp',
    'email' => 'john@brand.com',
    'website' => 'https://brand.com',
    'offer_landing_page' => 'https://brand.com/offer',
    'contact_address' => [
        'address_1' => '456 Market St',
        'city' => 'San Francisco',
        'zip_postal_code' => '94105',
        'country_id' => 232,
        'region_code' => 'CA'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-Eflow-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://api.eflow.team/v1/networks/advertiser/signup"

	payload := strings.NewReader("{\n  \"firstname\": \"John\",\n  \"lastname\": \"Smith\",\n  \"company\": \"Brand Corp\",\n  \"email\": \"john@brand.com\",\n  \"website\": \"https://brand.com\",\n  \"offer_landing_page\": \"https://brand.com/offer\",\n  \"contact_address\": {\n    \"address_1\": \"456 Market St\",\n    \"city\": \"San Francisco\",\n    \"zip_postal_code\": \"94105\",\n    \"country_id\": 232,\n    \"region_code\": \"CA\"\n  }\n}")

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

	req.Header.Add("X-Eflow-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://api.eflow.team/v1/networks/advertiser/signup")
  .header("X-Eflow-Api-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"firstname\": \"John\",\n  \"lastname\": \"Smith\",\n  \"company\": \"Brand Corp\",\n  \"email\": \"john@brand.com\",\n  \"website\": \"https://brand.com\",\n  \"offer_landing_page\": \"https://brand.com/offer\",\n  \"contact_address\": {\n    \"address_1\": \"456 Market St\",\n    \"city\": \"San Francisco\",\n    \"zip_postal_code\": \"94105\",\n    \"country_id\": 232,\n    \"region_code\": \"CA\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.eflow.team/v1/networks/advertiser/signup")

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

request = Net::HTTP::Post.new(url)
request["X-Eflow-Api-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"firstname\": \"John\",\n  \"lastname\": \"Smith\",\n  \"company\": \"Brand Corp\",\n  \"email\": \"john@brand.com\",\n  \"website\": \"https://brand.com\",\n  \"offer_landing_page\": \"https://brand.com/offer\",\n  \"contact_address\": {\n    \"address_1\": \"456 Market St\",\n    \"city\": \"San Francisco\",\n    \"zip_postal_code\": \"94105\",\n    \"country_id\": 232,\n    \"region_code\": \"CA\"\n  }\n}"

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