To manage your Organisation's users, go to the Users page from the Admin section in the Main Menu.
Only Interu that have a Account Owner or Admin role can access the User page as described below. Users with Contributor or Reviewer roles will not see the User page option in the Admin page.
To access it:
Click the Admin icon in the left-hand Main Menu
Scroll to the Memberships section
Select Users
You'll then access the different list of Users for the selected Organisation (see Manager Users).