curl --request POST \
  --url 'https://{domain}/wp-json/sagescreen/v1/wp-admin/admin-ajax.php?nonce=&action=sagescreen_edit_council_user' \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data action=sagescreen_edit_council_user \
  --data 'nonce=<string>' \
  --data user_id=123 \
  --data first_name=John \
  --data last_name=Doe \
  --data email=john@example.com \
  --data 'phone=+15551234567' \
  --data linkedin=https://linkedin.com/in/johndoe \
  --data 'whatsapp=+15551234567' \
  --data 'display_name=John Doe' \
  --data role=council_power_user \
  --data reset_password=false

import requests

url = "https://{domain}/wp-json/sagescreen/v1/wp-admin/admin-ajax.php?nonce=&action=sagescreen_edit_council_user"

payload = {
    "action": "sagescreen_edit_council_user",
    "nonce": "<string>",
    "user_id": "123",
    "first_name": "John",
    "last_name": "Doe",
    "email": "john@example.com",
    "phone": "+15551234567",
    "linkedin": "https://linkedin.com/in/johndoe",
    "whatsapp": "+15551234567",
    "display_name": "John Doe",
    "role": "council_power_user",
    "reset_password": "false"
}
headers = {"Content-Type": "application/x-www-form-urlencoded"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/x-www-form-urlencoded'},
  body: new URLSearchParams({
    action: 'sagescreen_edit_council_user',
    nonce: '<string>',
    user_id: '123',
    first_name: 'John',
    last_name: 'Doe',
    email: 'john@example.com',
    phone: '+15551234567',
    linkedin: 'https://linkedin.com/in/johndoe',
    whatsapp: '+15551234567',
    display_name: 'John Doe',
    role: 'council_power_user',
    reset_password: 'false'
  })
};

fetch('https://{domain}/wp-json/sagescreen/v1/wp-admin/admin-ajax.php?nonce=&action=sagescreen_edit_council_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://{domain}/wp-json/sagescreen/v1/wp-admin/admin-ajax.php?nonce=&action=sagescreen_edit_council_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 => "action=sagescreen_edit_council_user&nonce=%3Cstring%3E&user_id=123&first_name=John&last_name=Doe&email=john%40example.com&phone=%2B15551234567&linkedin=https%3A%2F%2Flinkedin.com%2Fin%2Fjohndoe&whatsapp=%2B15551234567&display_name=John%20Doe&role=council_power_user&reset_password=false",
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/x-www-form-urlencoded"
  ],
]);

$response = curl_exec($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://{domain}/wp-json/sagescreen/v1/wp-admin/admin-ajax.php?nonce=&action=sagescreen_edit_council_user"

	payload := strings.NewReader("action=sagescreen_edit_council_user&nonce=%3Cstring%3E&user_id=123&first_name=John&last_name=Doe&email=john%40example.com&phone=%2B15551234567&linkedin=https%3A%2F%2Flinkedin.com%2Fin%2Fjohndoe&whatsapp=%2B15551234567&display_name=John%20Doe&role=council_power_user&reset_password=false")

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

	req.Header.Add("Content-Type", "application/x-www-form-urlencoded")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://{domain}/wp-json/sagescreen/v1/wp-admin/admin-ajax.php?nonce=&action=sagescreen_edit_council_user")
  .header("Content-Type", "application/x-www-form-urlencoded")
  .body("action=sagescreen_edit_council_user&nonce=%3Cstring%3E&user_id=123&first_name=John&last_name=Doe&email=john%40example.com&phone=%2B15551234567&linkedin=https%3A%2F%2Flinkedin.com%2Fin%2Fjohndoe&whatsapp=%2B15551234567&display_name=John%20Doe&role=council_power_user&reset_password=false")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://{domain}/wp-json/sagescreen/v1/wp-admin/admin-ajax.php?nonce=&action=sagescreen_edit_council_user")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/x-www-form-urlencoded'
request.body = "action=sagescreen_edit_council_user&nonce=%3Cstring%3E&user_id=123&first_name=John&last_name=Doe&email=john%40example.com&phone=%2B15551234567&linkedin=https%3A%2F%2Flinkedin.com%2Fin%2Fjohndoe&whatsapp=%2B15551234567&display_name=John%20Doe&role=council_power_user&reset_password=false"

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