Need to expose a new endpoint on PushAuth service

Customers are having issues with the Android and iOS versions of the Authenticator app around the device token refresh. Currently, Push Auth service does not provide any mechanism to send an updated device token. One solution would be to expose a new endpoint on PushAuth service so that the Authenticator app can send the new deviceToken to AM. As AM uses Amazon SNS, another possible solution is to handle the token refresh on the server side (to be verified).