Install Admin Columns Plugin And Activate It , Go To User Page In Admin Dashboard , In The Bulk Actions Row , You Can See A Settings Icon , Click That . Now You Can See Add Columns , In Type Select Custom Field , Now A New Section Will Appear Called Field , In Field Select wrc_invited_uers , Now Give The Label ( Name ) As Your Wish Example : Invited User , Now Click Update , Now Go To User You Can See New Cloumn Called Invited Users Which Is Given In The Label Field , In Invited User Cloumn , It Will Like 203 OR 506 OR MORE , It Is Mean That The User Have Referred 503 Members , It Shows The User Id , So If It Shows For Example 503 So He Referred One Member , That Member User ID Is 503 , When It Shows For Example 503 , 504 , Now He Referred 2 Membres , So That Members User ID Was 503 And 504 , Thats IT , Thanks !!