curl --request DELETE \
  --url https://api.messaging.phonovation.com/subscriptions/1/subscription/{channel}/{subscriptionId} \
  --header 'Authorization: <api-key>'

import requests

url = "https://api.messaging.phonovation.com/subscriptions/1/subscription/{channel}/{subscriptionId}"

headers = {"Authorization": "<api-key>"}

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

print(response.text)

using RestSharp;


var options = new RestClientOptions("https://api.messaging.phonovation.com/subscriptions/1/subscription/{channel}/{subscriptionId}");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("Authorization", "<api-key>");
var response = await client.DeleteAsync(request);

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

HttpResponse<String> response = Unirest.delete("https://api.messaging.phonovation.com/subscriptions/1/subscription/{channel}/{subscriptionId}")
  .header("Authorization", "<api-key>")
  .asString();

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.messaging.phonovation.com/subscriptions/1/subscription/{channel}/{subscriptionId}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "DELETE",
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>"
  ],
]);

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

curl_close($curl);

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

const options = {method: 'DELETE', headers: {Authorization: '<api-key>'}};

fetch('https://api.messaging.phonovation.com/subscriptions/1/subscription/{channel}/{subscriptionId}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));