The Users API enables account owners to manage their account's team members access to account assets. Through this API, you can access team member data and roles, including open invites, and assign and unassign team member roles to each asset, ensuring that each team member has the appropriate level of access to the different assets within the account.
This API manages team members within accounts, and is not intended for managing customer access to individual sites.
This article shares some typical use cases you can support, as well as an example flow that supports each use case. You're certainly not limited to these use cases, but they can be a helpful jumping off point as you plan your implementation.
If your company has a Wix account with employees as team members, you may want to periodically check the access that each team member has to your account assets and the roles they have for each site.