User Firstname and Lastname from API

I am facing a problem where I am trying to retrieve the Firstname and Lastname of the user from the API using GET /people/#{user_id}.

This call works fine when I execute it with an administrative user, however with a normal user I get a 404 error and the following header is returned: X-404-Reason: admin_required

I am assuming the user needs to be an admin to access the people API, but I am only trying to get the details for the authenticated user.

Calls to /account/who_am_i/ works, however this does not return first name or last name.

Does anyone know how to resolve this problem? Any help will be appreciated.

Johan.