Note that non-admin users can see all users in the company, including
First Name, Last name, and Email address, when they take actions in the
UI such as sharing segments and Workspace projects, adding recipients to
alerts and scheduled reports, etc.The three elements of admin status,
title, and phone haven't been previously exposed in the UI so that is
additional information that was added for API 2.0. We can consider
making a change such that only admins can pull the lists of users via
API but ...