title: firebase dynamic link with react-navigation
body: <p>I have followed this document <a href="https://rnfirebase.io/docs/v4.1.x/links/android" rel="nofollow noreferrer">https://rnfirebase.io/docs/v4.1.x/links/android</a> and able to run <code>adb shell am start -W -a android.intent.action.VIEW -d "https://abc123.app.goo.gl" com.myapp.superapp</code> to start the app.</p>
  
  <p>How can open a dynamic link <code>https://abc123.app.goo.gl</code> it open the <code>VideoScreen</code> and pass the <code>contentparam</code>   </p>
  
  <pre><code>Video:{
    screen : VideoScreen,
    path:'wvc/:contentparam',
  }
  </code></pre>
  
  <p><strong>So I tried this when clicking <a href="https://abc123.app.goo.gl" rel="nofollow noreferrer">https://abc123.app.goo.gl</a> (dynamic link):</strong></p>
  
  <pre><code>componentDidMount () {
      Linking.getInitialURL().then((url) =&gt; {
        console.log('Initial url is: ' + url);
      }).catch(err =&gt; console.error('An error occurred', err));
  }
  </code></pre>
  
  <p>However app opened but <code>console.log</code> given <code>null</code></p>