MyServices Permissions: Admin, Editor
Google Cloud Billing Account Permissions: Billing Administrator
Note: Only clients with a billing account under Revolgy can add users in the GCP billing acount via MyServices
How to add an user in GCP billing account:
1. Select GCP in the left panel
2. Click on Accounts on a GCP Billing Account you want to change permissions
3. Now you can add an User, Service Account, Groups and choose a concrete role as billing.admin, billing.user, billing.viewer