curl --request PUT \
  --url https://api.swoogo.com/api/v1/registrants/update/{registrant_id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data email= \
  --data first_name= \
  --data last_name=

import requests

url = "https://api.swoogo.com/api/v1/registrants/update/{registrant_id}"

payload = {
    "email": "",
    "first_name": "",
    "last_name": ""
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/x-www-form-urlencoded"
}

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

print(response.text)

const options = {
  method: 'PUT',
  headers: {
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/x-www-form-urlencoded'
  },
  body: new URLSearchParams({email: '', first_name: '', last_name: ''})
};

fetch('https://api.swoogo.com/api/v1/registrants/update/{registrant_id}', 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.swoogo.com/api/v1/registrants/update/{registrant_id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => "email=&first_name=&last_name=",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "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://api.swoogo.com/api/v1/registrants/update/{registrant_id}"

	payload := strings.NewReader("email=&first_name=&last_name=")

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

	req.Header.Add("Authorization", "Bearer <token>")
	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.put("https://api.swoogo.com/api/v1/registrants/update/{registrant_id}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/x-www-form-urlencoded")
  .body("email=&first_name=&last_name=")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.swoogo.com/api/v1/registrants/update/{registrant_id}")

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

request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/x-www-form-urlencoded'
request.body = "email=&first_name=&last_name="

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

{
  "bio": "",
  "birth_date": "",
  "cancelled_at": null,
  "cc_email": "",
  "checked_in_at": null,
  "company": "Alan D Rosenburg Cpa Pc",
  "created_at": "2019-08-30 16:57:59",
  "email": "atomkiewicz@hotmail.com",
  "event_id": 1,
  "ext_token": "5CIBDyTOnFEmLiG47T60v3KXO5SW4COH_1567184279",
  "first_name": "Aleshia",
  "gender": {
    "id": null,
    "value": null
  },
  "group_balance_due": 0,
  "group_gross": "0.00",
  "group_id": 1,
  "group_net": "0.00",
  "group_paid": "0.00",
  "group_tax": "0.00",
  "h_check_out": "",
  "id": 1,
  "individual_gross": "0.00",
  "individual_net": "0.00",
  "individual_tax": "0.00",
  "ip_address": "192.168.1.110",
  "job_title": "",
  "last_name": "Tomkiewicz",
  "middle_name": "",
  "mobile_phone": "",
  "notes": null,
  "prefix": "",
  "profile_picture": "",
  "reference": null,
  "registration_status": "confirmed",
  "session_ids": [],
  "suffix": "",
  "twitter_handle": "",
  "updated_at": "2019-11-12 21:51:55",
  "work_phone": ""
}

{
  "name": "Unauthorized",
  "message": "Your request was made with invalid credentials.",
  "code": 0,
  "status": 401
}

{
  "name": "Forbidden",
  "message": "You do not have access to that resource.",
  "code": 0,
  "status": 403
}

{
  "name": "Not Found",
  "message": "The requested resource does not exist.",
  "code": 0,
  "status": 404
}

{
  "name": "Internal Server Error",
  "message": "An error occurred while processing your request.",
  "code": 0,
  "status": 500
}