Swift: Pass facebook login graphRequest result between viewcontrollers

I'm using facebook sdk to implement a facebook login to my app. In the viewcontroller where I implement the login I also do a facebook graphrequest which allows me to get information about the current user.

The code for this graph request is:

        let graphRequest: FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: nil)
    graphRequest.startWithCompletionHandler({ (connection, result, error) -> Void in            
        if error != nil {                
            //handle error
            println("graphrequest error")
        } else {
            self.firstName = result.valueForKey("first_name") as? String
        }
    })

The user information comes back from the closure as the "result" paramater which can then be decomposed into its components ie firstname as above.

I know I can pass the first name value (and all other values individually) from this viewcontroller to the next. My question is (for efficiency) how can I pass the actual "result" itself (which contains all the user data) between viewcontrollers?

To pass it I figured I have to know its TYPE, looking at the facebook sdk info I thought I'd discovered the type is a FBSDKLoginManagerLoginResult but when I pass this to the next viewcontroller it shows up as nil. During debugging I PO'd the result and ended up with the following (a fake test user)

    Printing description of result:
{
    email = "wvjuyaz_greenestein_1428614609@tfbnw.net";
    "first_name" = Barbara;
    gender = female;
    id = 1391655294490653;
    "last_name" = Greenestein;
    link = "http://ift.tt/1GQyFYd";
    locale = "en_US";
    "middle_name" = Amichehgcdjh;
    name = "Barbara Amichehgcdjh Greenestein";
    timezone = 0;
    "updated_time" = "2015-04-09T21:23:30+0000";
    verified = 0;
}

What type is this? and how do I pass it (in full) to the next viewcontroller?