To manage users go to the manage users section
You can manage your entire team from here. Who are your callers, who are admins and you can even check when their licence are being expired.
Add a Member:
You can send invites to new members to join your workspace in TeleCRM from here. Just type their work mail ID and tap on Invite User.
You can delete your existing team members by tapping on the three dots in front of their names and then Delete User.