title: How to push notification from rest client for testing purpose
body: <p>Hi I am trying to push the notification from rest client to android app. I am doing like below -</p>
  
  <pre><code>URL - https://android.googleapis.com/gcm/send
  Method - POST
  Headers - Authorization: my_server_key
  </code></pre>
  
  <p>I always get this message </p>
  
  <blockquote>
    <p>Status Code: 401 Unauthorized
    Alternate-Protocol: 443:quic,p=0.002
    Cache-Control: private, max-age=0</p>
  </blockquote>
  
  <p><img src="https://i.stack.imgur.com/V2jzU.png" alt="enter image description here"></p>
  
  <p>I am not sure what I am missing &amp; last I am using correct server api key.</p>
  
  <p>Please assist &amp; thanks in advance.</p>