Log in to the Management Panel and select the server from the list.
Once inside, click on the “Users” option in the top menu.
Click on the “New User” button.
A small tab will open where you will have to enter the email address of the person you want to invite and then select the permissions you want to give them. When you are done, press the “Invite User” button.
Afterwards, the user will receive an email with an invitation to create an account. You can view the user’s permissions, modify them or delete them completely from the menu.