You can represent individuals under a given Client with
users.
You can implement client users to manage individual access to the Authorized Buyers UI, and to retrieve information for negotiations.
An individual user is represented by a
ClientUser.
A client user can only use features that their parent Client has access to. A
client user who has accepted your invitation can access the Authorized Buyers
Marketplace UI while signed into the Google account connected to their email.
You can't modify the email of a ClientUser after creation. If you
need to change an email, we recommend removing
and readding
the ClientUser.