Need Help with Apple Push Provisioning.

Hi, Please refer the info graphic . I'm an issuer Bank App, who wants to add a card to phone's Digital Wallet. When I hit add to Apple or Google wallet, my API call goes to a Token Requester server and then to Token Service provider. In this process, I do get a JWT token back, but when I try to add token to Digital Wallet, I always get the message "The pass cannot be read because it is not valid".

So few question:

• Is there a way to debug the token that is received by the app?
• Is there any kind of API console that I can look to see what is happening and why the pass is not valid?
• I, being the Issuer Bank App, a Token Service Requester and A Token Service Provider, who should be communicating with Apple servers?
• Are there any documents that explicitly shows (example) the flow of adding a credit card to Digital Wallet from iOS perspective?

Any other help is appreciated.

On my end, I have done this:

public void AddToDeviceAsync(string data)
        {
            try
            {
                var dataArray = Encoding.UTF8.GetBytes(data);
                if (data.Length > 0)
                {
                    if (PKAddPassesViewController.CanAddPasses && PKPassLibrary.IsAvailable)
                    {
                        _nsData = NSData.FromArray(dataArray);
                        ObjCRuntime.Class.ThrowOnInitFailure = false;
                        _pkPass = new PKPass(_nsData, out NSError e);
                        if (!string.IsNullOrWhiteSpace(e?.LocalizedDescription))
                        {
                            UserDialogs.Instance.AlertAsync(e.LocalizedDescription, AppResources.Alert);
                            return;
                        }
                        if (!PkLibrary.Contains(_pkPass))
                        {
                            var controller = new PKAddPassesViewController(_pkPass);
                            var rootViewController = UIApplication.SharedApplication.Delegate.GetWindow().RootViewController;
                            if (rootViewController != null)
                            {
                                var topController = TopViewControllerWithRootViewController(rootViewController);
                                topController?.PresentViewController(controller, true, null);
                            }
                        }
                        else
                        {
                            UserDialogs.Instance.AlertAsync(AppResources.Pass_Already_Present, AppResources.Alert);
                        }
                    }
                }
                else
                {
                    UserDialogs.Instance.AlertAsync(AppResources.Invalid_Pass_Data, AppResources.Alert);
                }
            }
            catch (Exception e)
            {
                UserDialogs.Instance.AlertAsync(e.Message, AppResources.Alert);
            }
        }