Xamarin: Issues with transitioning between controllers and storyboard views - xamarin.ios

Question

I realize this might come across as a very basic question, but I just downloaded Xamarin three days ago, and I've been stuck on the same issue for two days without finding a solution.
Here is what I am trying to do:
Get user input, call API, parse JSON and pass data to another controller, and change views.
Here is what I have been able to do so far: I get the user input, I call the API, I parse the response back, write the token to a file, and I want to pass the remaining data to the second controller.
This is the code I am trying:
var verifyCode = Storyboard.InstantiateViewController("verify") as VerifyCodeController;
if (verifyCode != null)
{
this.NavigationController.PushViewController(verifyCode, true);
}
My storyboard setup:
Navigation controller -> routesTo -> FirstController
I have another UI Controller View set up with the following properties set:
storyboardid: verify
restorationid: verify
and I am trying to push that controller view onto the navigation controller.
Right now this line is erroring out:
var verifyCode = Storyboard.InstantiateViewController("verify") as VerifyCodeController;
giving me this error, which I don't know what it means: Could not find an existing managed instance for this object, nor was it possible to create a new managed instance.
Am I way off in my approach?
p.s: I cannot use the ctrl drag thing like the tutorial suggests because I have an asynchronous call. And I cannot under no circumstances make it synchronous. So all the page transition has to be manual.
EDIT
to anyone requesting more code or more info:
partial void registerButton_TouchUpInside (UIButton sender)
{
phone = registrationNumber.Text;
string url = url;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create (url);
request.Method = "GET";
Console.WriteLine("Getting response...");
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
if (response.StatusCode != HttpStatusCode.OK)
{
Console.Out.WriteLine("Error fetching data. Server returned status code: {0}", response.StatusCode);
}
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
string content = reader.ReadToEnd();
if (string.IsNullOrWhiteSpace(content))
{
//Console.WriteLine(text);
Console.Out.WriteLine("Response contained empty body...");
}
else
{
var json = JObject.Parse (content);
var token = json["token"];
var regCode = json["regCode"];
var aURL = Environment.GetFolderPath (Environment.SpecialFolder.MyDocuments);
var filename = Path.Combine (aURL, "app.json");
File.WriteAllText(filename, "{token: '"+token+"'}");
// transition to main view. THIS IS WHERE EVERYTHING GETS MESSED UP
var verifyCode = Storyboard.InstantiateViewController("verify") as VerifyCodeController;
if (verifyCode != null)
{
this.NavigationController.PushViewController(verifyCode, true);
}
}
}
}
}
Here is all the info for every view in my storyboard:
1- Navigation controller:
- App starts there
- The root is the register pager, which is the page we are currently working on.
2- The register view.
- The root page
- class RegisterController
- No storyboard id
- No restoration id
3- The validate view
- Not connected to the navigation controller initially, but I want it to be connected eventually. Do I have to connect it either way? Through a segue?
- class VerifyCodeController
- storyboard id : verify
- restoration id : verify
If you guys need more information I'm willing to post more. I just think I posted everything relevant.