Update MySite properties when Facebook is used as an Identity Provider

I am using Facebook as Identity provider to log in to SharePoint 2013. And it is achieved successfully. User can log-in to SharePoint using Facebook Credentials.

Now i want to update MySite profile with User Logged in via Facebook.

E.g. Update Birthdate property with data fetched from Facebook.

I followed this article but it uses a web part to update properties. How can i update properties on user sign-in to SharePoint and MySite properties get updated at that time only ? i.e As Soon as user signs in with Facebook as Identity provider, it will check for mapped UserProfile properties and update accordingly.