curl --request GET \
  --url https://app.flextell.ai/api/v1/invoices/{id}/preview \
  --header 'Authorization: Bearer <token>' \
  --header 'X-Tenant: <x-tenant>'

import requests

url = "https://app.flextell.ai/api/v1/invoices/{id}/preview"

headers = {
    "X-Tenant": "<x-tenant>",
    "Authorization": "Bearer <token>"
}

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

print(response.text)

const options = {
  method: 'GET',
  headers: {'X-Tenant': '<x-tenant>', Authorization: 'Bearer <token>'}
};

fetch('https://app.flextell.ai/api/v1/invoices/{id}/preview', 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://app.flextell.ai/api/v1/invoices/{id}/preview",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "X-Tenant: <x-tenant>"
  ],
]);

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

curl_close($curl);

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

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://app.flextell.ai/api/v1/invoices/{id}/preview"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("X-Tenant", "<x-tenant>")
	req.Header.Add("Authorization", "Bearer <token>")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://app.flextell.ai/api/v1/invoices/{id}/preview")
  .header("X-Tenant", "<x-tenant>")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.flextell.ai/api/v1/invoices/{id}/preview")

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

request = Net::HTTP::Get.new(url)
request["X-Tenant"] = '<x-tenant>'
request["Authorization"] = 'Bearer <token>'

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

{
  "success": "<string>",
  "data": {
    "invoice_id": 123,
    "document_number": "<string>",
    "html": "<string>"
  }
}

{
  "message": "<string>"
}

{
  "message": "<string>"
}

{
  "success": true,
  "error_code": "RESOURCE_NOT_FOUND",
  "message": "<string>",
  "errors": null,
  "data": null
}

{
  "message": "<string>",
  "errors": {}
}

{
  "success": false,
  "error_code": "SETUP_REQUIRED",
  "message": "Complete the required setup steps to continue.",
  "data": {
    "next_step": "clinic_info"
  }
}