AWS orphan secret engine

I’m creating AWS users with vault AWS secret engine with TTL of 7 days. In order to create the AWS user first I login into vault with 8 hours TTL token and then create the aws user with 7 days TTL.

When the login TTL expired after 8 hours the AWS user revoked, which is a normal behavior.
I’m trying to create the AWS user as orphan and keep is live for 7 days. i don’t see any documentation about it.

Can someone advice?