Can't access property

[douma]

This is my json:
{"error":{"title":"Cannot login","message":"Username is required"}}

This is my code, the last println is never executed:
let json = JSONValue(response)
println(response)
if let userName = json["error"]["title"].string{
println(userName)
}

[douma]

When running the code below:

    let json = JSONValue(response)
    let userName = json["error"]["title"]
    println(response)
    println(userName)

I receive this error:

{"error":{"title":"Cannot login","message":"Username is required"}}
JSON Keypath Error: Incorrect Keypath "/error/title"

[douma]

Ok solved it with:

//make sure var response = json string with type NSData and parse this below

    let jsonObject : AnyObject! = NSJSONSerialization.JSONObjectWithData(response, options: NSJSONReadingOptions.MutableContainers, error: nil)

    var json = JSONValue(jsonObject)
    println(json["error"]["title"].string)