how to check whether the user is already registered (i.e. the same name and phone number is already in my UserRecordsTable) . when the bot asks the name and phone number, if the same name and phone number is registered, it should give a prompt saying the user with same name and phone number is already registered and show all of his details saved inside the Table. i have saved the name in workflow.name variable and for phone number its workflow.phonenum,