Generating AWS creditials through Cognito Using Swift iOS App

Trying to follow the example set on the amazon-cognito site with regards to obtaining AWS credentials from a facebook login on iOS. I am trying to translate the Objective C into swift and am running into an issue when setting the logins of the credential provider.

(http://ift.tt/1lDHFBg) under "Use Facebook"

Here in my viewController I try:

    let token = FBSession.activeSession().accessTokenData.accessToken

    let credentialsProvider : AWSCredentialsProvider = AWSServiceManager.defaultServiceManager().defaultServiceConfiguration.credentialsProvider

    credentialsProvider.logins = NSDictionary(dictionary: [AWSCognitoLoginProviderKey.Facebook: token])

but on the third line xCode states AWSCredentialsProvider does not have a field "logins" though the tutorial makes it seem as such.

Thanks for your help! I assume I am incorrectly grabbing the credentialsProvider.