Thanks for your reply,i am planning as below
I will get the all the user by group ID(I will create a Default Group and add all user to this on creation)
then i will check whether the user is present in CRM Group(i will create another group in azure to implement my logic)
If no ,then i will create contact in CRM and then will add the user to CRM group ,so that it will be skipped in next run
But my challenge is now how can i add a user to a default group in azure on creation/addition,do you have any suggestion?