Currently, I am working on a quick action on related object.Scenario:On the Account Object ,mobile user should be able to create new case which is related list on the account object.In the quick action , we have Account(lookup),Contact(lookup),subject,description.I need to prepopulate the contact look up with current logged in profile user.We need to create predfined values for this.Please guide me the formula to be to used to prepopulate the contact look up