AWSIdentityRepository.kt

    /**
     * Federate with Facebook authentication
     */
    override fun federateWithFacebook(accessToken: AccessToken) {
        Log.d(TAG, "Federating with Facebook")
        thread(start = true) {
            with(service.identityManager.underlyingProvider) {
                clear()
                withLogins(mapOf("graph.facebook.com" to accessToken.token))
                refresh()
            }

            val user = User().apply {
                username = accessToken.userId
                tokens[TokenType.ACCESS_TOKEN] = accessToken.token
                userAttributes["provider"] = "graph.facebook.com"
            }
            Log.d(TAG, "Federated result: ${service.identityManager.isUserSignedIn}")
            runOnUiThread { mCurrentUser.postValue(user) }
        }
    }