title: When running a post request it gives me status code 401
body: <p>When i wrote python code to execute a post request to send an sms , it outputs  an error
  with status code 401 : <code>{&quot;name&quot;:&quot;Unauthorized&quot;,&quot;message&quot;:&quot;App header missing&quot;,&quot;code&quot;:0,&quot;status&quot;:401}</code></p>
  <p>How can i correct this error ? i have no clue to find what is missing. It says unauthorized and app header missing.<br> I included captured request file below (.har file)</p>
  <p><code>url  = &quot;https://&lt;censored&gt;.com&quot;</code></p>
  <p><code>payload = {&quot;phone&quot;:0777123456, &quot;name&quot;:&quot;&quot;}</code></p>
  <p><code>res = requests.post(url, json=payload)</code></p>
  <p><code>print(res.text)</code></p>
  <p><a href="https://filebin.net/7d9483d03s0bx5mq" rel="nofollow noreferrer">https://filebin.net/7d9483d03s0bx5mq</a></p>