The unique ID for the customer’s Google Workspace account. As an account administrator, you can also use the my_customer alias to represent your account’s customer ID. The customer ID can be obtained by the List Users action.
Email
The email of the member to add to the group. A member can be a user or another group. The email must be unique and cannot be an alias of another group.
Group Key
A unique identifier of the group in which to add a member. The value can be the group’s email address, group alias, or the unique group ID.
Role
The member’s role in a group. The API returns an error for cycles in group memberships. For example, if group1 is a member of group2, group2 cannot be a member of group1. For more information about a member’s role, see the administration help center.