People & groups
Governance → People & groups shows users, groups and roles, and the egret grants and rules that reach each one.

Four tabs: Users, Groups, Roles and Unmatched names. The Users tab lists people with their email and username, a search box and a Show service accounts switch. People appear here once they have signed in through SSO, together with the groups the identity provider reports.
The shield button (top right) checks a person's access.