title: Deep linking with Brnach.IO with sendGrid integration issue as passing params is undefined while opening link from mail using React native
body: <p><strong>Goal</strong></p>
  
  <p>I am sending email with deep linking implementation with Branch.IO with sendGrid integration. While user click on link my react native app open in phone and redirect me to screen based on query params in url which i have provided during create link in API. </p>
  
  <p><strong>Problem</strong></p>
  
  <p>I am able to open app from link but query params i have provide in link is display as blank. so i am not able to open screen where i want to redirect to user in app.</p>
  
  <pre><code>branch.subscribe(({ params, error, uri }) =&gt; {
    if (error) {
      console.log('Error from Branch: ' + error)
      return
    }
    console.log("params :: ", params);
    if(params.reset) {
      // Redirect user to reset password screen
      console.log("params.reset :: " + params.reset);
      Actions.resetpassword({resetToken: params.reset});
    } else if(params.verify) {
      // Verify signup user
      axios.post('http://localhost:3030/authmanagement', {
          "action":"verifySignupLong",
          "value": params.verify
        }).then(response =&gt; {
            Actions.login({isVerifySuccess: true});
        }, error =&gt; {
          Actions.login();
        });
    }
  });
  </code></pre>
  
  <p>I have write this code as suggest Branch.IO documentation. In params i have send reset and verify token which i got as blank string.</p>
  
  <p><strong>Information</strong></p>
  
  <p>This code is working without integration with sendGrid in deep linking. But for mailing tracking i used sendGrid. So when i try to email with sendGrid it will create problem.</p>
  
  <p>I have setup Link Branding in SendGrid account and also add CNAME in my domain as given in instruction of sendGrid integration for deep linking.</p>
  
  <p>I have check mailed link in <a href="https://i.stack.imgur.com/RBHPT.png" rel="nofollow noreferrer">Redirect Detective portal</a> </p>
  
  <p>I have verified link and it will generate valid url with params. please look into below image for more clarification</p>
  
  <p><a href="https://i.stack.imgur.com/RBHPT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RBHPT.png" alt="Image for Redirect Detective"></a></p>