Opening another Unity app with java intent, sending a parameter and reading it in the second Unity app

Hello everyone, I have been struggling with this problem for days now, I would really appreciate some help. I am making a gear vr game that requires people to put in their email and name before they play. The idea here is to avoid having a vr keyboard input and just have a simple launch app with UI fields that once filled will open the vr app and send the name and email as a java intent. I've been all over the web trying to look for solutions but nothing has worked so far, here is the code I use in the launch app:

 public void LaunchApp() {
         bool fail = false;
         string message = playerName.text + "_" + email.text;
         AndroidJavaClass up = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
         AndroidJavaObject ca = up.GetStatic<AndroidJavaObject>("currentActivity");
         AndroidJavaObject packageManager = ca.Call<AndroidJavaObject>("getPackageManager");
         AndroidJavaObject launchIntent = null;
 
         try
         {
             launchIntent = packageManager.Call<AndroidJavaObject>("getLaunchIntentForPackage", bundleId);
             launchIntent.Call<AndroidJavaObject>("putExtra", bundleId + "arguments", message);
         }
         catch (System.Exception e){
             fail = true;
         }
 
         if (fail) {
             Debug.Log("app not found");
         }
         else
         {
             ca.Call("startActivity", launchIntent);
         }
         up.Dispose();
         ca.Dispose();
         packageManager.Dispose();
         launchIntent.Dispose();
     }

and this is the code I use to try and read the intent in the vr app once it opens, right in the start function:

 void Start () {
         string arguments = "";
 
         AndroidJavaClass UnityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
         AndroidJavaObject currentActivity = UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
 
         AndroidJavaObject intent = currentActivity.Call<AndroidJavaObject>("getIntent");
         bool hasExtra = intent.Call<bool>("hasExtra", "arguments");
 
         if (hasExtra)
         {
             AndroidJavaObject extras = intent.Call<AndroidJavaObject>("getExtras");
             arguments = extras.Call<string>("getString", "arguments");
             mytext.text = arguments;
         }
     }

I also tried going the "custom" android plugin way but no luck, I'm not that well versed in native java dev, Any ideas what I am doing wrong?

Thank you