How exactly you are using the new member account on the Google Cloud Platform? Were you having a trouble on adding the member account in
Cloud Identity and Access Management (Cloud IAM)? If that's your scenario, as long as a member account belongs to
this types and has necessary access privileges on respective Google Cloud Platform resources(t
his page shows you how to grant Cloud IAM roles to project members using the Google Cloud Console), then that member should be able to access those specific Google Cloud resources without any issues.