This shortcode does not render anything. It syncs the logged in user’s Infusionsoft contact record down to Memberium. This can be used to refresh the contact data after a form is submitted, or an action is taken, without requiring the user to log in again to refresh their data.
This shortcode should ONLY be used when it is known that the Infusionsoft record has been updated.
For other situations you should use the update-contact HTTP POST to push updates to Memberium.