title: Unregistered Registration Token in Firebase
body: <p>I got unregistered registration token even I am sure my token is correct and I check it in my log I am using master token <code>FirebaseInstanceId.Instance.Token</code>.</p>
  
  <p>Here is my method:</p>
  
  <pre><code>private void ConfigureFireBase()
          {
  
              Task.Run(() =&gt; {
                  var instanceId = FirebaseInstanceId.Instance;
                  Android.Util.Log.Debug("TAG", "{0} {1}", instanceId?.Token?.ToString(), instanceId.GetToken(GetString(Resource.String.gcm_defaultSenderId), Firebase.Messaging.FirebaseMessaging.InstanceIdScope));
  
              });
  
          }
  </code></pre>
  
  <p>I check as well <code>OnTokenRefresh</code> method the same token</p>
  
  <pre><code>public override void OnTokenRefresh()
          {
              var refreshedToken = FirebaseInstanceId.Instance.Token;
              Log.Debug(TAG, "Refreshed token: " + refreshedToken);
              SendRegistrationToServer(refreshedToken);
          }
  </code></pre>
  
  <p>but when I tried in Firebase console it gives me this error message, when I tried in <a href="http://pushtry.com/" rel="noreferrer">http://pushtry.com/</a> with the same token I got not <strong>NotRegistered</strong> message </p>
  
  <p><strong><em>Note</em></strong> when I uninstall the app and install again the token working, but after while I got this error message.</p>