//We build GoogleApiClient first and add AppInviteApi to it.

GoogleApiClient client2 = new GoogleApiClient.Builder(this)
                .enableAutoManage(this, this)
                .addApi(AppInvite.API)
                .build();

// [START get_deep_link]
        // Check if this app was launched from a deep link. Setting autoLaunchDeepLink to true
        // would automatically launch the deep link if one is found.
//Notice we are using client2 which is a variable of the GoogleClientApi to get the invite.

        boolean autoLaunchDeepLink = true;
        AppInvite.AppInviteApi.getInvitation(client2, this, autoLaunchDeepLink)
                .setResultCallback(
                        new ResultCallback<AppInviteInvitationResult>() {
                            @Override
                            public void onResult(@NonNull AppInviteInvitationResult result) {

//
//This first block of the if statement  is skipped because result.getStatus().isSuccess() returns false. Which means it failed to capture the app invite
                                if (result.getStatus().isSuccess()) {
                                    // Extract deep link from Intent
                                    Intent intent = result.getInvitationIntent();
                                    String deepLink = AppInviteReferral.getDeepLink(intent);
                                    //String deepLink2 =

                                    Log.d("invite_code", deepLink);

                                    Intent i = new Intent(getApplicationContext(), Referral.class);
                                    i.putExtra("invite_code", deepLink);
                                    startActivity(i);
                                    // Handle the deep link. For example, open the linked
                                    // content, or apply promotional credit to the user's
                                    // account.
                                } else {
                                    //failed to get result
                                    Intent intent = result.getInvitationIntent();
                                    Log.d("firebase_invite", "getInvitation: no deep link found." +         AppInviteReferral.getDeepLink(intent));
                                }
                            }
                        });
        // [END get_deep_link]