An already logged in user can get details of his or her account only. It is not possible for regular users to look up information about other users. However, super-users may read details of any other person by the other user's ID.
Invoke GET /zato/sso/user without any input except for UST to query for user details by current UST (user session token). If the calling user is a regular one not a super-super, it is the only way for that user to look up his or her own account.
If current UST belongs to a super-user, it is also possible to provide a user_id input - thus allowing administrators to access data about other users.