curl --request POST \
  --url http://dolphinflashcards.com/api/create-folder \
  --header 'Content-Type: application/json' \
  --data '
{
  "jwtToken": "eyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6ImEzMmZkZDRiMTQ2Njc3NzE5YWIyMzcyODYxYmRlZDg5In0.eyJpc3MiOiJodHRwOi8vZG9scGhpbmZsYXNoY2FyZHMuY29tIiwiYXVkIjoiYXBpIiwic3ViIjoidU5RR2lIencxdk9EaExybTVDRWtaQ1ZoTU93MSIsImFjY2Vzc190b2tlbiI6IjRiZTA2NDNmLTFkOTgtNTczYi05N2NkLWNhOThhNjUzNDdkZCIsImFjY2Vzc190b2tlbl9yYXciOiJ0ZXN0IiwiaWF0IjoxNzI2Nzc0MTYzfQ.F-fxFitPQF-gGHyhGPGxE_zj_b8XJybqe4J_iYG66BC4Dqm4LTb8RpcDLyYUhRCcpphihpWGbdp",
  "folder": "firstFolder"
}
'

import requests

url = "http://dolphinflashcards.com/api/create-folder"

payload = {
    "jwtToken": "eyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6ImEzMmZkZDRiMTQ2Njc3NzE5YWIyMzcyODYxYmRlZDg5In0.eyJpc3MiOiJodHRwOi8vZG9scGhpbmZsYXNoY2FyZHMuY29tIiwiYXVkIjoiYXBpIiwic3ViIjoidU5RR2lIencxdk9EaExybTVDRWtaQ1ZoTU93MSIsImFjY2Vzc190b2tlbiI6IjRiZTA2NDNmLTFkOTgtNTczYi05N2NkLWNhOThhNjUzNDdkZCIsImFjY2Vzc190b2tlbl9yYXciOiJ0ZXN0IiwiaWF0IjoxNzI2Nzc0MTYzfQ.F-fxFitPQF-gGHyhGPGxE_zj_b8XJybqe4J_iYG66BC4Dqm4LTb8RpcDLyYUhRCcpphihpWGbdp",
    "folder": "firstFolder"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    jwtToken: 'eyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6ImEzMmZkZDRiMTQ2Njc3NzE5YWIyMzcyODYxYmRlZDg5In0.eyJpc3MiOiJodHRwOi8vZG9scGhpbmZsYXNoY2FyZHMuY29tIiwiYXVkIjoiYXBpIiwic3ViIjoidU5RR2lIencxdk9EaExybTVDRWtaQ1ZoTU93MSIsImFjY2Vzc190b2tlbiI6IjRiZTA2NDNmLTFkOTgtNTczYi05N2NkLWNhOThhNjUzNDdkZCIsImFjY2Vzc190b2tlbl9yYXciOiJ0ZXN0IiwiaWF0IjoxNzI2Nzc0MTYzfQ.F-fxFitPQF-gGHyhGPGxE_zj_b8XJybqe4J_iYG66BC4Dqm4LTb8RpcDLyYUhRCcpphihpWGbdp',
    folder: 'firstFolder'
  })
};

fetch('http://dolphinflashcards.com/api/create-folder', 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 => "http://dolphinflashcards.com/api/create-folder",
  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([
    'jwtToken' => 'eyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6ImEzMmZkZDRiMTQ2Njc3NzE5YWIyMzcyODYxYmRlZDg5In0.eyJpc3MiOiJodHRwOi8vZG9scGhpbmZsYXNoY2FyZHMuY29tIiwiYXVkIjoiYXBpIiwic3ViIjoidU5RR2lIencxdk9EaExybTVDRWtaQ1ZoTU93MSIsImFjY2Vzc190b2tlbiI6IjRiZTA2NDNmLTFkOTgtNTczYi05N2NkLWNhOThhNjUzNDdkZCIsImFjY2Vzc190b2tlbl9yYXciOiJ0ZXN0IiwiaWF0IjoxNzI2Nzc0MTYzfQ.F-fxFitPQF-gGHyhGPGxE_zj_b8XJybqe4J_iYG66BC4Dqm4LTb8RpcDLyYUhRCcpphihpWGbdp',
    'folder' => 'firstFolder'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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 := "http://dolphinflashcards.com/api/create-folder"

	payload := strings.NewReader("{\n  \"jwtToken\": \"eyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6ImEzMmZkZDRiMTQ2Njc3NzE5YWIyMzcyODYxYmRlZDg5In0.eyJpc3MiOiJodHRwOi8vZG9scGhpbmZsYXNoY2FyZHMuY29tIiwiYXVkIjoiYXBpIiwic3ViIjoidU5RR2lIencxdk9EaExybTVDRWtaQ1ZoTU93MSIsImFjY2Vzc190b2tlbiI6IjRiZTA2NDNmLTFkOTgtNTczYi05N2NkLWNhOThhNjUzNDdkZCIsImFjY2Vzc190b2tlbl9yYXciOiJ0ZXN0IiwiaWF0IjoxNzI2Nzc0MTYzfQ.F-fxFitPQF-gGHyhGPGxE_zj_b8XJybqe4J_iYG66BC4Dqm4LTb8RpcDLyYUhRCcpphihpWGbdp\",\n  \"folder\": \"firstFolder\"\n}")

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

	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("http://dolphinflashcards.com/api/create-folder")
  .header("Content-Type", "application/json")
  .body("{\n  \"jwtToken\": \"eyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6ImEzMmZkZDRiMTQ2Njc3NzE5YWIyMzcyODYxYmRlZDg5In0.eyJpc3MiOiJodHRwOi8vZG9scGhpbmZsYXNoY2FyZHMuY29tIiwiYXVkIjoiYXBpIiwic3ViIjoidU5RR2lIencxdk9EaExybTVDRWtaQ1ZoTU93MSIsImFjY2Vzc190b2tlbiI6IjRiZTA2NDNmLTFkOTgtNTczYi05N2NkLWNhOThhNjUzNDdkZCIsImFjY2Vzc190b2tlbl9yYXciOiJ0ZXN0IiwiaWF0IjoxNzI2Nzc0MTYzfQ.F-fxFitPQF-gGHyhGPGxE_zj_b8XJybqe4J_iYG66BC4Dqm4LTb8RpcDLyYUhRCcpphihpWGbdp\",\n  \"folder\": \"firstFolder\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("http://dolphinflashcards.com/api/create-folder")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"jwtToken\": \"eyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6ImEzMmZkZDRiMTQ2Njc3NzE5YWIyMzcyODYxYmRlZDg5In0.eyJpc3MiOiJodHRwOi8vZG9scGhpbmZsYXNoY2FyZHMuY29tIiwiYXVkIjoiYXBpIiwic3ViIjoidU5RR2lIencxdk9EaExybTVDRWtaQ1ZoTU93MSIsImFjY2Vzc190b2tlbiI6IjRiZTA2NDNmLTFkOTgtNTczYi05N2NkLWNhOThhNjUzNDdkZCIsImFjY2Vzc190b2tlbl9yYXciOiJ0ZXN0IiwiaWF0IjoxNzI2Nzc0MTYzfQ.F-fxFitPQF-gGHyhGPGxE_zj_b8XJybqe4J_iYG66BC4Dqm4LTb8RpcDLyYUhRCcpphihpWGbdp\",\n  \"folder\": \"firstFolder\"\n}"

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

{
  "success": "Folder \"folderName\" created"
}

{
  "error": "Your supplied json keys do not match the expected format. The request should be in the format: {'jwtToken': '', 'folder': ''}"
}