curl --request POST \
  --url https://api.sandbox.goteal.co/users \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <api-key>' \
  --data '
{
  "forename": "John",
  "surname": "Smith",
  "date_of_birth": "2019-05-17T00:00:00.000Z",
  "post_codes": [
    "SW1A 1AA",
    "SW1A 1AB"
  ],
  "payroll_period_months": 36,
  "ni_number": "QQ123456C",
  "ext_id": "ext-12345",
  "recurring_checks_enabled": true,
  "recurring_check_frequency": "WEEKLY",
  "recurring_check_end_date": "2050-01-01T00:00:00.000Z",
  "hmrc_enabled": false,
  "payslip_upload_enabled": true,
  "payroll_connections_enabled": true
}
'

import requests

url = "https://api.sandbox.goteal.co/users"

payload = {
    "forename": "John",
    "surname": "Smith",
    "date_of_birth": "2019-05-17T00:00:00.000Z",
    "post_codes": ["SW1A 1AA", "SW1A 1AB"],
    "payroll_period_months": 36,
    "ni_number": "QQ123456C",
    "ext_id": "ext-12345",
    "recurring_checks_enabled": True,
    "recurring_check_frequency": "WEEKLY",
    "recurring_check_end_date": "2050-01-01T00:00:00.000Z",
    "hmrc_enabled": False,
    "payslip_upload_enabled": True,
    "payroll_connections_enabled": True
}
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({
    forename: 'John',
    surname: 'Smith',
    date_of_birth: '2019-05-17T00:00:00.000Z',
    post_codes: ['SW1A 1AA', 'SW1A 1AB'],
    payroll_period_months: 36,
    ni_number: 'QQ123456C',
    ext_id: 'ext-12345',
    recurring_checks_enabled: true,
    recurring_check_frequency: 'WEEKLY',
    recurring_check_end_date: '2050-01-01T00:00:00.000Z',
    hmrc_enabled: false,
    payslip_upload_enabled: true,
    payroll_connections_enabled: true
  })
};

fetch('https://api.sandbox.goteal.co/users', 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.sandbox.goteal.co/users",
  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([
    'forename' => 'John',
    'surname' => 'Smith',
    'date_of_birth' => '2019-05-17T00:00:00.000Z',
    'post_codes' => [
        'SW1A 1AA',
        'SW1A 1AB'
    ],
    'payroll_period_months' => 36,
    'ni_number' => 'QQ123456C',
    'ext_id' => 'ext-12345',
    'recurring_checks_enabled' => true,
    'recurring_check_frequency' => 'WEEKLY',
    'recurring_check_end_date' => '2050-01-01T00:00:00.000Z',
    'hmrc_enabled' => false,
    'payslip_upload_enabled' => true,
    'payroll_connections_enabled' => true
  ]),
  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://api.sandbox.goteal.co/users"

	payload := strings.NewReader("{\n  \"forename\": \"John\",\n  \"surname\": \"Smith\",\n  \"date_of_birth\": \"2019-05-17T00:00:00.000Z\",\n  \"post_codes\": [\n    \"SW1A 1AA\",\n    \"SW1A 1AB\"\n  ],\n  \"payroll_period_months\": 36,\n  \"ni_number\": \"QQ123456C\",\n  \"ext_id\": \"ext-12345\",\n  \"recurring_checks_enabled\": true,\n  \"recurring_check_frequency\": \"WEEKLY\",\n  \"recurring_check_end_date\": \"2050-01-01T00:00:00.000Z\",\n  \"hmrc_enabled\": false,\n  \"payslip_upload_enabled\": true,\n  \"payroll_connections_enabled\": true\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://api.sandbox.goteal.co/users")
  .header("X-API-KEY", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"forename\": \"John\",\n  \"surname\": \"Smith\",\n  \"date_of_birth\": \"2019-05-17T00:00:00.000Z\",\n  \"post_codes\": [\n    \"SW1A 1AA\",\n    \"SW1A 1AB\"\n  ],\n  \"payroll_period_months\": 36,\n  \"ni_number\": \"QQ123456C\",\n  \"ext_id\": \"ext-12345\",\n  \"recurring_checks_enabled\": true,\n  \"recurring_check_frequency\": \"WEEKLY\",\n  \"recurring_check_end_date\": \"2050-01-01T00:00:00.000Z\",\n  \"hmrc_enabled\": false,\n  \"payslip_upload_enabled\": true,\n  \"payroll_connections_enabled\": true\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.sandbox.goteal.co/users")

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  \"forename\": \"John\",\n  \"surname\": \"Smith\",\n  \"date_of_birth\": \"2019-05-17T00:00:00.000Z\",\n  \"post_codes\": [\n    \"SW1A 1AA\",\n    \"SW1A 1AB\"\n  ],\n  \"payroll_period_months\": 36,\n  \"ni_number\": \"QQ123456C\",\n  \"ext_id\": \"ext-12345\",\n  \"recurring_checks_enabled\": true,\n  \"recurring_check_frequency\": \"WEEKLY\",\n  \"recurring_check_end_date\": \"2050-01-01T00:00:00.000Z\",\n  \"hmrc_enabled\": false,\n  \"payslip_upload_enabled\": true,\n  \"payroll_connections_enabled\": true\n}"

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

{
  "user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "created_at": "2019-05-17T00:00:00.000Z",
  "forename": "John",
  "surname": "Smith",
  "date_of_birth": "2019-05-17T00:00:00.000Z",
  "post_codes": [
    "SW1A 1AA",
    "SW1A 1AB"
  ],
  "payroll_period_months": 36,
  "ni_number": "QQ123456C",
  "ext_id": "ext-12345",
  "recurring_checks_enabled": true,
  "recurring_check_frequency": "WEEKLY",
  "recurring_check_end_date": "2050-01-01T00:00:00.000Z",
  "hmrc_enabled": false,
  "payslip_upload_enabled": true,
  "payroll_connections_enabled": true
}

{
  "errors": [
    "The request is missing the required field `name`"
  ]
}

{
  "errors": [
    "No X-API-KEY header provided or wrong value"
  ]
}

{
  "errors": [
    "This user already exists. [name] and [email] must be a unique combination"
  ]
}