Create FBSDKAccessToken from ACAccount

Question

I'm using v4.8 of the Facebook iOS SDK and developing for iOS 8+. I'm also using v1.11.0 of the Parse framework

I'm wanting to get access to Facebook via ACAccount & ACAccountStore classes. The login works perfectly, but after I get access, I need to convert the ACAccount into FBSDKAccessToken in order to login to the Parse framework:

Here's my Swift code:

let accountStore = ACAccountStore()
let socialAccount = accountStore.accountTypeWithAccountTypeIdentifier(ACAccountTypeIdentifierFacebook)

let appID = NSBundle.mainBundle().infoDictionary?["FacebookAppID"] as? String ?? ""
let permissions = ["user_birthday", "user_relationships", "user_location", "user_about_me"]

accountStore.requestAccessToAccountsWithType(socialAccount, options: [ACFacebookAppIdKey: appID, ACFacebookPermissionsKey: permissions]) {
    (granted: Bool, error: NSError!) in

    var token: FBSDKAccessToken? = nil

    if let socialAccount = accountStore.accountsWithAccountType(socialAccount).last as? ACAccount, let userID = socialAccount.username where granted {
        token = FBSDKAccessToken(tokenString: socialAccount.credential.oauthToken, permissions: permissions, declinedPermissions: nil,
            appID: appID, userID: userID, expirationDate: NSDate.distantFuture(), refreshDate: NSDate.distantFuture())
    }

    if let token = token {
        print("token \(token.tokenString) \(token.permissions) \(token.appID) \(token.userID) \(token.expirationDate) \(token.refreshDate)")
        PFFacebookUtils.logInInBackgroundWithAccessToken(token, block: nil)
    }
}

I get this error: error: Parse::InvalidSessionError (Code: 251, Version: 1.11.0)

What am I doing wrong?