Add azure ad group to azure devops project group

Hi Guys,
I am new to terraform. I was playing around with the azuredevops provider, try to add an azure ad group to a project group like project administrators using the azuredevops_group_membership resource.
I can see that individual users can be added but does anyone know of azure AD groups can be added?

Has anyon been able to do this?

I have the same question. For now, I can only manage to add one single user.