How to get share count in SocialSharing-PhoneGap-Plugin for whats app Invites?

My current app is being developed in IONIC-3. We have need to track the no of invite send from referee using whats app and Facebook . Referee is awarded with no of invitations sent , not based on no of Installs . What is the easiest way to achieve this ? Is it part of SocialSharing-PhoneGap-Plugin already or this needs to be customize to get this share count