Could you please check if there is a way to be done automatically.
Otherwise we need to enter all the contact information twice, And it may lead to some mistakes.
The other issue about this is:
when you create a group member, you need to enter the login/password, but when you create a contact member, you need to enter first name/last name. Then they appear under different names which is not really convinient.
Thank you in advance for investigating.