using RestSharp;


var options = new RestClientOptions("http://localhost:53294/api/v1/Contact/{sourceContactId}/MergeTo/{destinationContactId}");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("Authorization", "Bearer <token>");
var response = await client.PostAsync(request);

Console.WriteLine("{0}", response.Content);

const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

fetch('http://localhost:53294/api/v1/Contact/{sourceContactId}/MergeTo/{destinationContactId}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_PORT => "53294",
  CURLOPT_URL => "http://localhost:53294/api/v1/Contact/{sourceContactId}/MergeTo/{destinationContactId}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

import requests

url = "http://localhost:53294/api/v1/Contact/{sourceContactId}/MergeTo/{destinationContactId}"

headers = {"Authorization": "Bearer <token>"}

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

print(response.text)

const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

fetch('http://localhost:53294/api/v1/Contact/{sourceContactId}/MergeTo/{destinationContactId}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));