Get the current user custom column data in Swift Parse

As I login via this user to my own application, after I've login, how do I get the custom column data of this user? For example, I want to get the IntakeCode from this user and show it in text field, how to I do that?

I've try this code, but it doesn't work, it says that

'AnyObject' is not convertible to 'String'; did you mean to use 'as!' to force downcast?

var displayIntake:NSString = PFUser.currentUser()!.objectForKey("IntakeCode")
txtIntake.text = displayIntake as String

Hope that someone can help with it, I just want that IntakeCode from this user show in the textfield.