const axios = require('axios');

const response = await axios.get('https://app.sajn.se/api/v1/documents', {
  headers: {
    'Authorization': `Bearer ${process.env.SAJN_API_KEY}`
  }
});

import requests

response = requests.get(
    'https://app.sajn.se/api/v1/documents',
    headers={'Authorization': f'Bearer {os.environ["SAJN_API_KEY"]}'}
)

<?php
$ch = curl_init('https://app.sajn.se/api/v1/documents');
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Authorization: Bearer ' . getenv('SAJN_API_KEY')
]);
$response = curl_exec($ch);

package main

import (
    "net/http"
    "os"
)

func main() {
    client := &http.Client{}
    req, _ := http.NewRequest("GET", "https://app.sajn.se/api/v1/documents", nil)
    req.Header.Add("Authorization", "Bearer " + os.Getenv("SAJN_API_KEY"))
    resp, _ := client.Do(req)
}