Group Or Expand Rows In DGV?

I need to create a solution in which I populate some rows with data from a database.In those rows I put usernames and total values (total resulted from products selled in one month by every user)The idea is that I need to make somehow that when I click on one user (event CellContentClick on DGV) to expand the user in the way that I can see all products selled by that user in the selected month.I readed on the internet that I have to use datagridview inside the datagridview.I was thinking maybe I can have some expandable rows inside the datagridview (like in Excel) and when I click on + sign to expand the rows and to populate with selled products.