There is no way for an user to manage its application profile (except for IoT Clouds with Credentials Authentication). An user and his access to instances and administration can be managed in the user administration section.
The user administration section can be accessed by a Global User Moderator, a Global User Admin or a Global Admin Manager.
A Global User Admin can edit users' name, email etc. This permissions is mostly designed for IoT Clouds with Credentials Authentication.
A Global Admin Manager can edit users' access to any instance, host, DB role, service or client. It can also modify users' global permissions. See admin-permissions for more detail.
In IoT Clouds with Credentials Authentication, this section also allows managment of Superadmins. A Superadmin can be managed only by another Superadmin.