As an admin, you will have access to manage your team, invite new people, and deactivate users in the Admin tab found in the lower-left corner of Leadr. All members of the team will be able to view who is in the organization under the People tab.
If you click on Admin in the lower-left corner you can view all users in your organization. From here you can Invite, edit, or deactivate users.

Invite People
If you want to invite someone select People from within the dropdown
Next, select Invite and begin to fill out the user details
Once the user's name, email, and manager is entered, select Invite User
The invited user will now remain in the Invited tab until the user logs into Leadr.